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Small Safety Door Switch / Slide Key Unit [D4NS/D4NS-SK]

On Sale Till 31/03/2025

OMRON

Next generation safety door switch supporting multi-contact, man-hours saving and micro load

[Features]
· As regards the contact structure, in addition of the conventional 1NC/1NO, 2NC, three type of 2NC/1NO, 3NC are available.
· M12 connector type easy to replace and saving man-hours is also released.
· Standardized au clad contact with high contact reliability.
· Supports both i.e. general load and micro load.
· Metallic head variation

Part Number

Configured Part Number is shown.

Product Specifications
Part Numbers
Catalog

Ordering Information of OMRON Limit Switch

• Switches (Operation Keys are sold separately.)

Consult with your OMRON representative when ordering any models that are not listed in this table.

Type	Contact configuration		Conduit outlet/Connector	Model
1-Conduit type	Slow-action	1NC/1NO	Pg13.5	D4NS-1AF *
			G1/2	D4NS-2AF *
			M20	D4NS-4AF
		2NC	Pg13.5	D4NS-1BF *
			G1/2	D4NS-2BF *
			M20	D4NS-4BF
		2NC/1NO	Pg13.5	D4NS-1CF *
			G1/2	D4NS-2CF *
			M20	D4NS-4CF
		3NC	Pg13.5	D4NS-1DF *
			G1/2	D4NS-2DF *
			M20	D4NS-4DF
	Slow-action MBB contact	1NC/1NO	Pg13.5	D4NS-1EF
			G1/2	D4NS-2EF
			M20	D4NS-4EF
		2NC/1NO	Pg13.5	D4NS-1FF
			G1/2	D4NS-2FF
			M20	D4NS-4FF
2-Conduit type	Slow-action MBB contact	1NC/1NO	G1/2	D4NS-6AF
		1NC/1NO	M20	D4NS-8AF
		2NC	G1/2	D4NS-6BF
		2NC	M20	D4NS-8BF
		2NC/1NO	G1/2	D4NS-6CF
		2NC/1NO	M20	D4NS-8CF
		3NC	G1/2	D4NS-6DF
		3NC	M20	D4NS-8DF
	Slow-action MBB contact	1NC/1NO	G1/2	D4NS-6EF
		1NC/1NO	M20	D4NS-8EF
		2NC/1NO	G1/2	D4NS-6FF
		2NC/1NO	M20	D4NS-8FF
1-Conduit type, with connector	Slow-action	1NC/1NO	M12 connector	D4NS-9AF
	Slow-action	2NC		D4NS-9BF
	Slow-action MBB contact	1NC/1NO		D4NS-9EF
1-Conduit type (High pull-force type)	Slow-action	1NC/1NO	G1/2	D4NS-2AF-SJ *
		1NC/1NO	M20	D4NS-4AF-SJ *
		2NC	G1/2	D4NS-2BF-SJ *
		2NC	M20	D4NS-4BF-SJ *
		2NC/1NO	G1/2	D4NS-2CF-SJ *
		2NC/1NO	M20	D4NS-4CF-SJ *
		3NC	G1/2	D4NS-2DF-SJ *
		3NC	M20	D4NS-4DF-SJ *

* Models with Korean S-mark certification.

• Operation Keys of Limit Switch

Type	Model
Horizontal mounting	D4DS-K1
Vertical mounting	D4DS-K2
Adjustable mounting (Horizontal)	D4DS-K3
Adjustable mounting (Horizontal/Vertical)	D4DS-K5

• Slide Keys of Limit Switch

Appearance	Specifications	Contents	Model	Applicable Door Switch
	Weight: 422 g Mechanical durability: 20,000 operations min	Slide Key (Operation Key included.): 1 Auxiliary mounting bracket: 1 Receptacle bracket: 1	D4NS-SK01	D4NS 1-conduit type
	Weight: 2,800 g Mechanical durability: 20,000 operations min.	Slide Key: 1 (Disable-prevention cover and Operation Key D4DS-K2 are already mounted on Slide Key) D4NS mounting tool: 1 Inner lever: 1 Inner lever mounting screws: 2 Door Switch mounting one-way screws: 2 Switch protective cover: 1 Switch protective cover screws: 4	D4NS-SK30	D4NS 1-conduit type

Dimensions/Operating Characteristics of OMRON Limit Switch

Note: All units are in millimeters unless otherwise indicated.

• Switches of Limit Switch

1-conduit Models

Operating characteristics	D4NS-1□F D4NS-2□F D4NS-3□F D4NS-4□F
Key insertion force Key extraction force	15 N max. 30 N max.
Pretravel (PT)	6±3 mm
Total travel (TT)	(28 mm)
Direct opening force* Direct opening stroke*	60 N min. 10 mm min.

* Always maintain the above operating characteristics for safe use.

2-conduit Models

Operating characteristics	D4NS-5□F D4NS-6□F D4NS-7□F D4NS-8□F
Key insertion force Key extraction force	15 N max. 30 N max.
Pretravel (PT)	6±3 mm
Total travel (TT)	(28 mm)
Direct opening force* Direct opening stroke*	60 N min. 10 mm min.

* Always maintain the above operating characteristics for safe use.

1-conduit Connector Models

Operating characteristics	D4NS-9□F
Key insertion force Key extraction force	15 N max. 30 N max.
Pretravel (PT)	6±3 mm
Total travel (TT)	(28 mm)
Direct opening force* Direct opening stroke*	60 N min. 10 mm min.

* Always maintain the above operating characteristics for safe use.

Note: Unless otherwise specified, a tolerance of 0.4 mm applies to all dimensions

• Operation Keys of Limit Switch

Note: Unless otherwise specified, a tolerance of 0.4 mm applies to all dimensions.

• D4NS-SK30 of Limit Switch

Open Door

Closed Door

Structure and Nomenclature of OMRON Limit Switch

• Structure of Limit Switch

Model Number Structure of OMRON Limit Switch

• Model Number Legend of Limit Switch

Switch (Standard type)

D4NS-

1. Conduit/Connector size

1.Pg13.5 (1-conduit)
2.G1/2 (1-conduit)
3.1/2-14NPT (1-conduit)
4.M20 (1-conduit)
5.Pg13.5 (2-conduit)
6.G1/2 (2-conduit)
7.1/2-14NPT compatible (2-conduit model with M20 conduit
size includes an M20-to-1/2-14NPT conversion adapter)
8.M20 (2-conduit)
9.M12 connector (1-conduit)

2. Built-in Switch

A: 1NC/1NO (slow-action)
B: 2NC (slow-action)
C: 2NC/1NO (slow-action)
D: 3NC (slow-action)
E: 1NC/1NO (MBB contact)
F: 2NC/1NO (MBB contact)

3. Head Mounting Direction

F: Four mounting directions possible (Front-side mounting at shipping)

Note: An order for the head part or the switch part alone cannot be accepted.
The Operation Key is sold separately.

Switch (High pull-force type)

D4DS-K

1. Conduit Outlete

2:G1/2 (1-conduit type)
4:M20 (1-conduit type)

2. Built-in Switch

A:1NC/1NO (slow-action)
B:2NC (slow-action)
C:2NC/1NO (slow-action)
D:3NC (slow-action)

Operation Key

D4DS-K

1. Operation Key Type

1.Horizontal mounting
2.Vertical mounting
3.Adjustable mounting (Horizontal)
5.Adjustable mounting (Horizontal/ Vertical)

: 30; 45; 60

Part Number
D4NS-1AF
D4NS-1BF
D4NS-1DF
D4NS-1FF
D4NS-2AD
D4NS-2AF
D4NS-2BF
D4NS-2CF
D4NS-2CF-SJ
D4NS-2DD
D4NS-2DF
D4NS-2EF
D4NS-4AF
D4NS-4BF
D4NS-4CF
D4NS-4DF
D4NS-4FF
D4NS-5AF
D4NS-5BF
D4NS-6AF
D4NS-6BF
D4NS-6CF
D4NS-6DF
D4NS-8AF
D4NS-8BF
D4NS-8CF
D4NS-8DF
D4NS-9AF
D4NS-9BF
D4NS-SK01
D4NS-SK30

Standard Unit Price	Minimum order quantity	Days to Ship	Detector Shape	Environment	Operating Temperature Range (°C)	Acquired Standards	Protection Structure	Force Required for Push Side O.F. (N)	Motion to Switching P.T. (mm)	Max. Stroke T.T (mm)	Contact Type	Mechanical Life (10,000 times)	Mechanical Operation Frequency (times/min or Less)	Rated Operating Voltage (V)	Rated Conductance Current (A)	Main Body External Dimension, Width W (mm)	Main Body External Dimension, Height H (mm)	Main Body External Dimension, Length L (mm)	Operating Position OP (mm)	Conduit size	Details Type	Mounting system	Direction of Operation	Contact format	Built-in Switch Specification	AC Rated Voltage	DC Rated Voltage	Head Material	Specifications	Door Switch Type
SGD 46.46	1 Piece(s)	Same day	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	Pg13.5	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	1NC/1NO	-	-	-	-	-	-
SGD 31.50	1 Piece(s)	Quote	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	Pg13.5	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC	-	-	-	-	-	-
SGD 50.86	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	Pg13.5	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	3NC	-	-	-	-	-	-
SGD 40.41	1 Piece(s)	6 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	100	30	-	-	-	-	-	-	Pg13.5 (1-conduit type)	Standard type	4-direction mounting supported (front direction at shipment)	-	-	2NC/1NO contact (MBB)	120 / 240	125 / 250	Plastic	-	Door switch
SGD 50.91	1 Piece(s)	8 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	100	30	-	-	-	-	-	-	G1/2 (1-conduit type)	Standard type	4-direction mounting supported (front direction at shipment)	-	-	1NC/1NO contact (slow-action)	120 / 240	125 / 250	Metal	-	Door switch
SGD 47.18	1 Piece(s)	13 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	G1/2	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	1NC/1NO	-	-	-	-	-	-
SGD 47.18	1 Piece(s)	65 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	G1/2	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC	-	-	-	-	-	-
SGD 50.86 SGD 24.92	1 Piece(s)	Same day	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	G1/2	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC/1NO	-	-	-	-	-	-
SGD 38.04	1 Piece(s)	6 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	10	30	-	-	-	-	-	-	G1/2 (1-conduit type)	High-load type	4-direction mounting supported (front direction at shipment)	-	-	2NC/1NO contact (slow-action)	120 / 240	125 / 250	Plastic	-	Door switch
SGD 53.53	1 Piece(s)	6 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	100	30	-	-	-	-	-	-	G1/2 (1-conduit type)	Standard type	4-direction mounting supported (front direction at shipment)	-	-	3NC contact (slow-action)	120 / 240	125 / 250	Metal	-	Door switch
SGD 50.86 SGD 10.17	1 Piece(s)	Same day	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	G1/2	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	3NC	-	-	-	-	-	-
SGD 37.59	1 Piece(s)	6 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	100	30	-	-	-	-	-	-	G1/2 (1-conduit type)	Standard type	4-direction mounting supported (front direction at shipment)	-	-	1NC/1NO contact (MBB)	120 / 240	125 / 250	Plastic	-	Door switch
SGD 47.18 SGD 9.44	1 Piece(s)	Same day	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	M20	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	1NC/1NO	-	-	-	-	-	-
SGD 47.18	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	M20	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC	-	-	-	-	-	-
SGD 50.86	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	M20	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC/1NO	-	-	-	-	-	-
SGD 34.00	1 Piece(s)	Quote	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	M20	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	3NC	-	-	-	-	-	-
SGD 40.41	1 Piece(s)	63 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	100	30	-	-	-	-	-	-	M20 (1-conduit type)	Standard type	4-direction mounting supported (front direction at shipment)	-	-	2NC/1NO contact (MBB)	120 / 240	125 / 250	Plastic	-	Door switch
SGD 72.06	1 Piece(s)	6 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	Pg13.5 (2-conduit type)	-	-	-	1NC/1NO	-	-	-	-	-	-
SGD 72.06	1 Piece(s)	6 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	Pg13.5 (2-conduit type)	-	-	-	2NC	-	-	-	-	-	-
SGD 56.69	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	G1/2	2 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	1NC/1NO	-	-	-	-	-	-
SGD 56.69	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	G1/2	2 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC	-	-	-	-	-	-
SGD 44.30	1 Piece(s)	6 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	100	30	-	-	-	-	-	-	G1/2 (2-conduit type)	Standard type	4-direction mounting supported (front direction at shipment)	-	-	2NC/1NO contact (slow-action)	120 / 240	125 / 250	Plastic	-	Door switch
SGD 60.34	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	G1/2	2 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	3NC	-	-	-	-	-	-
SGD 56.69	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	M20	2 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	1NC/1NO	-	-	-	-	-	-
SGD 56.69	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	M20	2 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC	-	-	-	-	-	-
SGD 60.34	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	56	31.5	88	10	M20	2 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC/1NO	-	-	-	-	-	-
SGD 44.30	1 Piece(s)	11 Day(s) or more	-	Standard	-30～70	TUV / UL / C-UL / CE / GB(CCC) / EN	IP67	-	-	-	-	100	30	-	-	-	-	-	-	M20 (2-conduit type)	Standard type	4-direction mounting supported (front direction at shipment)	-	-	3NC contact (slow-action)	120 / 240	125 / 250	Plastic	-	Door switch
SGD 70.48	1 Piece(s)	4 Day(s) or more	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	M12 Connectors	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	1NC/1NO	-	-	-	-	-	-
SGD 70.48 SGD 35.24	1 Piece(s)	Same day	[Others] Key	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	15	6±3	28	Mutual insulation double-throw	100	30	DC125V / DC250V	2.5	31	30.6	96	10	M12 Connectors	1 Conduit Shape	-	4-direction mounting supported (front direction at shipment) / plastic	2NC	-	-	-	-	-	-
SGD 234.91	1 Piece(s)	8 Day(s) or more	-	Standard	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Slide key unit	-	-	-	-	-	-	-	Slide key (operation key included): 1 pc, Auxiliary mounting bracket: 1 pc, Receptible bracket: 1 pc	-
SGD 658.81	1 Piece(s)	4 Day(s) or more	-	Standard / Cold Resistance	-30～70	UL / GB(CCC) / EN	IP67	-	-	-	-	100	30	DC125V / DC250V	2.5	170	76	388	-	-	Slide Units	-	-	-	-	-	-	-	-	-

Product TOP

Basic Information

Main Body Size	Small

Configure

31 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

Detector Shape
- Others
  - Key
Clear
Environment
- Standard
- Cold Resistance
Clear
Force Required for Push Side O.F.(N)
15
Clear
Contact Type
- Mutual insulation double-throw
Clear
Rated Operating Voltage(V)
- DC125V
- DC250V
Clear
Rated Conductance Current(A)
2.5
Clear
Operating Position OP(mm)
- 10
- -
Clear
Conduit size
G1/2

G1/2 (1-conduit type)

G1/2 (2-conduit type)

M12 Connectors

Pg13.5

Pg13.5 (1-conduit type)

Pg13.5 (2-conduit type)

M20

M20 (1-conduit type)

M20 (2-conduit type)
Clear
Details Type
- 1 Conduit Shape
- 2 Conduit Shape
- High-load type
- Slide Units
- Slide key unit
- Standard type
Clear
Mounting system
4-direction mounting supported (front direction at shipment)
Clear
Direction of Operation
4-direction mounting supported (front direction at shipment) / plastic

-
Clear
Contact format
- 1NC/1NO
- 2NC
- 2NC/1NO
- 3NC
Clear
Built-in Switch Specification
1NC/1NO contact (MBB)

1NC/1NO contact (slow-action)

2NC/1NO contact (MBB)

2NC/1NO contact (slow-action)

3NC contact (slow-action)
Clear
AC Rated Voltage
120 / 240
Clear
DC Rated Voltage
125 / 250
Clear
Head Material
- Metal
- Plastic
Clear
Specifications
- Slide key (operation key included): 1 pc, Auxiliary mounting bracket: 1 pc, Receptible bracket: 1 pc
Clear
Door Switch Type
- Door switch
Clear
type
- D4NS
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

Same day

4 Day(s) or Less

6 Day(s) or Less

8 Day(s) or Less

11 Day(s) or Less

13 Day(s) or Less

63 Day(s) or Less

65 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Tech Support

Factory Automation, Electronics, Tools, & MRO (Maintenance, Repair and Operations): Tel：(65) 6733 7211 / FAX：(65) 6733 0211; 9:00am - 6:00pm (Monday - Friday); Technical Inquiry

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Small Safety Door Switch / Slide Key Unit [D4NS/D4NS-SK]

Ordering Information of OMRON Limit Switch

Dimensions/Operating Characteristics of OMRON Limit Switch

Structure and Nomenclature of OMRON Limit Switch

Model Number Structure of OMRON Limit Switch

Basic Information

Configure

Specification/Dimensions

Detector Shape

Environment

Force Required for Push Side O.F.(N)

Contact Type

Rated Operating Voltage(V)

Rated Conductance Current(A)

Operating Position OP(mm)

Conduit size

Details Type

Mounting system

Direction of Operation

Contact format

Built-in Switch Specification

AC Rated Voltage

DC Rated Voltage

Head Material

Specifications

Door Switch Type

type

CAD

Days to Ship

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