Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket, 

Suitable for roller shutter doors, garage doors. Metal zinc alloy housing, for home burglar alarm system.

• Operation gap: 40~60mm

• Connecting type: Wired

• Wire length: 380 mm armored cable

• Material: Metal Zinc alloy

• Contact type: NC (normally closed) Switch OFF when magnet away

• Max. Switching voltage: 100V DC

• Max. current : 0.5A

• Max. load : 10W

• Mounting type: Surface mounted on the ground

• Suitable: Roller shutter doors, garage doors