MC-51 NC+NO Alarm Security Rolling Gate Garage Door Contact Magnetic Reed Switch Silver Gray Flexible Couplings Arm Length: 46mm / 1

Arm Length: 46mm / 1

* 50(+/-2%) x Curtain Track

Case Material: ABS

Purple ( each color 2 pcs)

meaning these fully threaded rods will not rust no matter how many years you use them for

MC-51 NC+NO Alarm Security Rolling Gate Garage Door Contact Magnetic Reed Switch Silver Gray Flexible Couplings Arm Length: 46mm / 1Description: 1. Actuation Distance: 15mm. Silver gray zinc alloy housing. 2. The reed switch is an electrical switch operated by an applied magnetic field. 3. Designed for use with alarm systems. Great for use in family and factory window, door. etc. 4. Screw Mounted for easily install. 5. NC means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). NO