Magnetic Reed Switch, 4 Pack NC Ring Alarm Contact Sensor Switch, Brown

Magnetic Reed Switch, 2 Pack NC NO Wired Magnetic Contact Switch, Black

Magnetic Reed Switch, 4 Pack NC Wired Magnetic Contact Switch, White

Door Window Contact Sensor (NC) Magnetic Reed Switch Rolling Door Contact Alarm

Magnetic Reed Switch, 1 Set NO NC Wired Door Window Contact Switch for Home

Reed Switch - Open Magnetic Sensor Switch - Plastic - Free UK P&P

Magnetic Reed Switch, 2 Pack NO Wired Magnetic Contact Switch, Black

5 Sets Magnetic Reed Switch NC Magnetic Contact Switch