MC-59 NC Alarm Rolling Gate Garage Door Contact Magnetic Reed Switch

3pcs Screws Mount Wired Magnetic Door Contact Reed Switch NC Normally Close

1 Set RC-33B NC+NO Magnetic Window Door Contact Alarm Reed Switch Recessed

1 Set RC-33B NC Magnetic Window Door Contact Alarm Reed Switch Recessed

White Anti Thief Magnetic Office Home Security Alarm

RC36 NC Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch White

2pcs RC33 NC Recessed Wire Door Contact Sensor Alarm Magnetic Reed Switch White

Surface Mount Wired Door Sensor Alarm Magnetic Reed Switch