Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switc...

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

Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch

Wired Door Contact Sensor NO Surface Mount Magnetic Reed Switch Black

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

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

Magnetic Reed Switch Normally Open or Closed NC NO Door Alarm Window Security G3

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