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

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

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

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

5pcs Wired Door Contact Sensor NC Surface Mount Magnetic Reed Switch Black

Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch

10Pcs RC-33 NC Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch USA

5pcs RC-33 NC Recessed Wired Security Contact Sensor Alarm Magnetic Reed Switch