![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: QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 10 with 40 Screws : Industrial & Scientific](https://m.media-amazon.com/images/I/31RZ0DEGI8L._AC_.jpg)
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: uxcell Wired Door Contact Window Sensor NO Surface Mount Magnetic Reed Switch Black : Tools & Home Improvement Amazon.com: uxcell Wired Door Contact Window Sensor NO Surface Mount Magnetic Reed Switch Black : Tools & Home Improvement](https://m.media-amazon.com/images/I/61egk8WSefS.jpg)
Amazon.com: uxcell Wired Door Contact Window Sensor NO Surface Mount Magnetic Reed Switch Black : Tools & Home Improvement
![Amazon.com: Flair Electronics Surface Mount Contact, Terminals, VIP100 (10 Pack) : Industrial & Scientific Amazon.com: Flair Electronics Surface Mount Contact, Terminals, VIP100 (10 Pack) : Industrial & Scientific](https://m.media-amazon.com/images/I/31RsmlB9CtL._AC_SY580_.jpg)
Amazon.com: Flair Electronics Surface Mount Contact, Terminals, VIP100 (10 Pack) : Industrial & Scientific
![Amazon.com: Gufastore 10pcs Surface Mount Alarm 10W 100V 0.5A in Max Magnetic Contact Ideal for Door Window Security Amazon.com: Gufastore 10pcs Surface Mount Alarm 10W 100V 0.5A in Max Magnetic Contact Ideal for Door Window Security](https://m.media-amazon.com/images/I/412V4Gr4ilL._AC_SY580_.jpg)
Amazon.com: Gufastore 10pcs Surface Mount Alarm 10W 100V 0.5A in Max Magnetic Contact Ideal for Door Window Security
![Amazon.com: uxcell MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 2pcs : Tools & Home Improvement Amazon.com: uxcell MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 2pcs : Tools & Home Improvement](https://m.media-amazon.com/images/I/41KunQ41P4L._AC_SY580_.jpg)
Amazon.com: uxcell MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 2pcs : Tools & Home Improvement
![Amazon.com: BNYZWOT MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 10 Pair : Industrial & Scientific Amazon.com: BNYZWOT MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 10 Pair : Industrial & Scientific](https://images-na.ssl-images-amazon.com/images/I/61UlS3aBmnL._AC_UL604_SR604,400_.jpg)
Amazon.com: BNYZWOT MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 10 Pair : Industrial & Scientific
![Amazon.com : 3 pcs Brown Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch. These ¾” Door Contact Position switches (DCS) Work with All Access Control and Burglar Amazon.com : 3 pcs Brown Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch. These ¾” Door Contact Position switches (DCS) Work with All Access Control and Burglar](https://m.media-amazon.com/images/I/51RlGBJgHgS.jpg)
Amazon.com : 3 pcs Brown Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch. These ¾” Door Contact Position switches (DCS) Work with All Access Control and Burglar
![Amazon.com : MC-32 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White - (6 Sets) : Electronics Amazon.com : MC-32 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White - (6 Sets) : Electronics](https://m.media-amazon.com/images/I/61IVtA1LHQL.jpg)
Amazon.com : MC-32 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White - (6 Sets) : Electronics
![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 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](https://m.media-amazon.com/images/I/317S9goPOQL._AC_SY1000_.jpg)
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 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 : 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](https://m.media-amazon.com/images/I/51U9JwbrcFL.jpg)
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: DIYhz Reed Switch GPS-14A 14mm Plastic Anti-Interference Normally Open Magnetic Control Switch 10PCS : Electronics Amazon.com: DIYhz Reed Switch GPS-14A 14mm Plastic Anti-Interference Normally Open Magnetic Control Switch 10PCS : Electronics](https://m.media-amazon.com/images/I/41lE+th6HIS._AC_SY580_.jpg)
Amazon.com: DIYhz Reed Switch GPS-14A 14mm Plastic Anti-Interference Normally Open Magnetic Control Switch 10PCS : Electronics
![Amazon.com: uxcell Wired Door Contact Window Sensor NC Surface Mount Magnetic Reed Switch Black : Tools & Home Improvement Amazon.com: uxcell Wired Door Contact Window Sensor NC Surface Mount Magnetic Reed Switch Black : Tools & Home Improvement](https://m.media-amazon.com/images/I/61rzyj6QdnS.jpg)
Amazon.com: uxcell Wired Door Contact Window Sensor NC Surface Mount Magnetic Reed Switch Black : Tools & Home Improvement
![Amazon.com : Fielec MC-31 Surface Mount Wired N.O./N.C. 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](https://m.media-amazon.com/images/I/216Jq2jftLL._AC_SY580_.jpg)
Amazon.com : Fielec MC-31 Surface Mount Wired N.O./N.C. Door Contact Sensor Alarm Magnetic Reed Switch White, : Electronics
![Amazon.com: 5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, for DC 5V 12V 24V Light (Black-B31) : Industrial & Scientific Amazon.com: 5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, for DC 5V 12V 24V Light (Black-B31) : Industrial & Scientific](https://images-na.ssl-images-amazon.com/images/I/61AQAFqiLgL._AC_UL600_SR600,400_.jpg)
Amazon.com: 5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, for DC 5V 12V 24V Light (Black-B31) : Industrial & Scientific
![Amazon.com: uxcell Wired Door Contact Window Sensor NO NC Surface Mount Magnetic Reed Switch Brown 3 Pcs : Electronics Amazon.com: uxcell Wired Door Contact Window Sensor NO NC Surface Mount Magnetic Reed Switch Brown 3 Pcs : Electronics](https://m.media-amazon.com/images/I/71qE-pZYecS.jpg)
Amazon.com: uxcell Wired Door Contact Window Sensor NO NC Surface Mount Magnetic Reed Switch Brown 3 Pcs : Electronics
![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: 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](https://m.media-amazon.com/images/I/31b2YFdH-gS._AC_.jpg)
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 : Fielect MC-44b Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics Amazon.com : Fielect MC-44b Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics](https://m.media-amazon.com/images/I/316b0NGRW3L._AC_SY580_.jpg)
Amazon.com : Fielect MC-44b Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics
![Amazon.com: Magnetic Reed Switch MC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 2 : Industrial & Scientific Amazon.com: Magnetic Reed Switch MC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 2 : Industrial & Scientific](https://m.media-amazon.com/images/I/41klmcOdtVL._SX342_.jpg)
Amazon.com: Magnetic Reed Switch MC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 2 : Industrial & Scientific
![RESALET Magnetic Reed Switch Alarm NC+NO Surface Mount Wired Contact Sensor for Gate Garage Window Door Security System Silver Gray MC-58 - - Amazon.com RESALET Magnetic Reed Switch Alarm NC+NO Surface Mount Wired Contact Sensor for Gate Garage Window Door Security System Silver Gray MC-58 - - Amazon.com](https://m.media-amazon.com/images/I/310553uUpVL._AC_SY580_.jpg)
RESALET Magnetic Reed Switch Alarm NC+NO Surface Mount Wired Contact Sensor for Gate Garage Window Door Security System Silver Gray MC-58 - - Amazon.com
![Amazon.com : Fielect 5pcs MC-51 Surface Mount Wired N.C. Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics Amazon.com : Fielect 5pcs MC-51 Surface Mount Wired N.C. Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics](https://images-na.ssl-images-amazon.com/images/I/51jR2ZUFdcL._AC_UL210_SR210,210_.jpg)
Amazon.com : Fielect 5pcs MC-51 Surface Mount Wired N.C. Door Contact Sensor Alarm Magnetic Reed Switch White : Electronics
![Amazon.com: BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair : Industrial & Scientific Amazon.com: BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair : Industrial & Scientific](https://m.media-amazon.com/images/I/31dIVP51cQL._AC_SY580_.jpg)
Amazon.com: BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair : Industrial & Scientific
![Amazon.com: Partsam 2Pcs Replacement for Kenworth T680 T880 and Peterbilt 576 Led Side Marker Turn Signal Lights Assemblies Amber Clear Lens 3-3014- SMD Sealed Led Rectangular Cab Roof Marker Lights Lamps LH&RH : Amazon.com: Partsam 2Pcs Replacement for Kenworth T680 T880 and Peterbilt 576 Led Side Marker Turn Signal Lights Assemblies Amber Clear Lens 3-3014- SMD Sealed Led Rectangular Cab Roof Marker Lights Lamps LH&RH :](https://m.media-amazon.com/images/I/51JwPmHfhBL._AC_.jpg)
Amazon.com: Partsam 2Pcs Replacement for Kenworth T680 T880 and Peterbilt 576 Led Side Marker Turn Signal Lights Assemblies Amber Clear Lens 3-3014- SMD Sealed Led Rectangular Cab Roof Marker Lights Lamps LH&RH :
![Amazon.com: BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair : Industrial & Scientific Amazon.com: BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair : Industrial & Scientific](https://m.media-amazon.com/images/I/51L3+oUpz3L.jpg)
Amazon.com: BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair : Industrial & Scientific
![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-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](https://m.media-amazon.com/images/I/71QwjY6jxwL._AC_SY355_.jpg)