3 pcs Recessed Brown Door Contacts NC Security Alarm Door Window Sensors With Magnetic Reed Switch. These ¾” Door Contact Position switches (DCS) Work with All Access Control and Burglar Alarm Systems auspowers_batchone [Widely Use&Easy to identify]:Work great

[Widely Use&Easy to identify]:Work great for woodworking

metal and ceramic tile

Flexibility- Allows placement of drippers exactly where necessary

INSTANTLY STOP LEAKAGE: Waterproof and high temperature resistant

3 pcs Recessed Brown Door Contacts NC Security Alarm Door Window Sensors With Magnetic Reed Switch. These ¾” Door Contact Position switches (DCS) Work with All Access Control and Burglar Alarm Systems auspowers_batchone [Widely Use&Easy to identify]:Work great3 pcs Recessed Brown Door Contacts NC Security Alarm Door Window Sensors With Magnetic Reed Switch. These Door Contact Position switches (DCS) Work with All Access Control and Burglar Alarm Systems These are the door contact sensors that are in use with any and all commercial or residential card access systems as well as all security burglar alarm system. The door position switches operate with a built an internal magnetic reed switch that closes when