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

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

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

Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch

Magnetic Switch Alarm Sensor Overhead Garage Door Contacts With L Bracket

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