Amazon.com: VictorsHome Magnetic Reed Switch NC Surface Mount Wired Door Window Contact Sensor with Adhesive Paper for Home Security and Burglar Alarm Systems MC-38 5pcs : Tools & Home Improvement
Amazon.com: BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair : Industrial & Scientific
Amazon.com: uxcell Wired Door Contact Window Sensor NC Surface Mount Magnetic Reed Switch Black : Tools & Home Improvement
Amazon.com: QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 10 with 40 Screws : Industrial & Scientific
Amazon.com : Fielect MC-44b Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics
Amazon.com: BNYZWOT MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 10 Pair : Industrial & Scientific
Amazon.com: uxcell Wired Door Contact Window Sensor NC Surface Mount Magnetic Reed Switch Black 3 Pcs : Tools & Home Improvement
Amazon.com: DIYhz Reed Switch GPS-14A 14mm Plastic Anti-Interference Normally Open Magnetic Control Switch 10PCS : Electronics
Amazon.com : uxcell 2pcs MC-51 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics
Amazon.com : Fielec MC-31 Surface Mount Wired N.O./N.C. Door Contact Sensor Alarm Magnetic Reed Switch White, : Electronics
Amazon.com : MC-32 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White - (6 Sets) : Electronics
Amazon.com: Gufastore 10pcs Surface Mount Alarm 10W 100V 0.5A in Max Magnetic Contact Ideal for Door Window Security
RESALET Magnetic Reed Switch Alarm NC Normally Closed Surface Mount Wired Contact Sensor for Gate Garage Window Door Security System Silver Gray MC-59: Amazon.com: Tools & Home Improvement
Amazon.com : TANE-60QC-WG-BR-PK50 Pack of 50 Wired Surface Mount Quick Connect Magnetic Door Window Contact Brown Color Alarm Security Magnetic Contact Switch Reed Switch Normally Open + UL Listed : Electronics
Amazon.com : Tane SM-20-WG-WH Wired Surface Mount Magnetic Door Window Contact White Color Magnetic Contact Switch Reed Switch Normally Open Alarm Security, Home Security, Burglar Alarm Systems + UL Listed : Security
Amazon.com : uxcell Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White MC-38 : Electronics