2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Win Color: white

5 Sets Magnetic Contacts Wired Window Door Sensor Reed Switch NC Surface

2 Set Magnetic Reed Switch NO NC Wired Surface Mount Door Window Color: white

Magnetic Reed Switch Normally Closed NC 12V Door Sensor Contacts Home Alarm

2 Pack Magnetic Reed Switch NC NO Wired Surface Mount Door Window Size: WHITE

Reed Switch Magnetic Switch Three Pin Normally Open Closed Conversion Tongue