New 10 x RC-33 NC Recessed Door Contact Sensor Alarm Magnet Reed Switch

10Pack N.C. Recessed Wired Security Window Door Contact Sensor Alarm Reed Switch

5 x Wired Door Contact Sensor SHOP NC Surface Mount Magnetic Reed Switch

2 Pack Magnetic Reed Switch NO NC Waterproof 12V Door Window Sensor Alarm

5 x Wired Door Contact Sensor NO Surface Mount Magnetic Reed Switch Brown

New 10 x RC-33 NC Recessed Door Contact Sensor Alarm Magnet Reed Switch

Door Window NO/NC Recessed Security Contact Sensor Alarm Magnetic Reed Switch

3pcs RC33 NO Recessed Wire Door Contact Sensor Alarm Magnetic Reed Switch White