Magnet 3/8 x 1/2 tall Cylinder Barrel DOOR CONTACT
This listing is for 1 rare earth magnets, with free shipping.
3/8-inch-wide (round) 1/2 long (tall)
To upgrade your alarm system, whether home or business, use these replacement magnets for a security connection contact or sensor, which offers a wider operating gap and in turn less false alarms.
Replace Wired Door or Window Sensors Detector for your Burglar Alarm 
Magnets can be dangerous, please use caution around children. 
Do not click together as they are brittle but powerful magnets. Do not get close to pacemakers and video tapes or credit cards.
Please ask if you need something other than what is listed, for instance: security systems accessories, cables and sensors and contacts.
Email with questions BEFORE you purchase. 
Alarm Dealers are Welcome
Please email Before you return the item there may be a 15% restocking fee