MC-31 Wired NC Magnetic Door Window Contact Sensor Alarm Reed Switch, 5 Pack

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

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

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

Wired Surface Mounted NC Magnetic Door Window Contact Sensor Alarm Switch 5 Pack

MC-31 Wired Surface Mounted NC Magnetic Door Window Contact Sensor Alarm

MC-31 Wired Surface Mounted NC Magnetic Door Window Contact Sensor Alarm Reed...