Magnetic Reed Switch RC-36 NC Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 5 (White)

$8.29

RC-33 NC/NO Magnetic Reed Switch Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Systems, Sets of 10, White

$16.99

Magnetic Reed Switch RC-36 NC Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 2

$5.99

MC-32 NC Magnetic Reed Switch Surface Mount Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Systems, Sets of 10, White

$8.99

Magnetic Reed Switch RC-35 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 6

$7.89

Magnetic Reed Switch MC-33C Normally Closed Recessed Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 3

$15.59

MC-31B NC/NO Magnetic Reed Switch Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Systems, Sets of 10, Black

$9.99

Magnetic Reed Switch MC-32 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 2

$14.94

Garage Door Reed Switch OC-55 NC/NO Surface Mount Wired Door and Window Alarm, Ferromagnetic Door Switch, Contact Sensor for Home Security and Burglar Alarm Reed Switch Silver Grey, Set of 1

$9.14

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

$9.99

jing Magnetic Reed Switch MC-31B NC & NO Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 5

$9.99

Magnetic Reed Switch MC-32 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White - (6 Sets)

$7.59

Gebildet 5pcs Recessed Wired Security Window Gate Contact Sensor Alarm Magnetic Reed Switch Black, Magnetic Door Sensor, Normally Closed Magnetic Switch

$8.99

Magnetic Reed Switch,Wired Door Window Contact Sensor,Micro Normally Open NO Alarm Reed Switch,10W 100v 0.5A Magnetic Reed Switch to DC 5V 12V 24V Light(2-Pack)

$16.99

MC-32 NC Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White (5 Sets)

$21.99

Augiimor 2PCS RC-35 NC & NO Wired Magnetic Door Window Contact Sensor Security Alarm Door Window Contact Sensor Magnetic Reed Switch (White)

$7.99

bnafes MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch 2 Sets

$14.99

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 (white-31)

$9.99

Magnetic Reed Switch,Normally Closed NC Waterproof Magnetic Switch,Micro Alarm Reed Switch 10W 100v 0.5A Magnetic Door Sensor Switch to DC 5V 12V 24V Lights（2 Pack）

$8.29

PATIKIL Magnetic Reed Switch, 10 Pack NC Wired Recessed Door Sensor Window Contact Switch for Alarm System, Black

$9.99

BNYZWOT MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 10pcs

$15.59

Magnetic Reed Switch,Hincell 5Sets Magnetic Door Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device,DC 5V 12V 24V Light

$5.99

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)

$9.99

Hxchen MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch - (5 Sets)

$17.59

bnafes 4Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, for DC 5V 12V 24V Light

$12.89

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

$7.59

BNYZWOT MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 10 Pair

$11.99

Dairzitv MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 10pcs

$15.69

Dairzitv MC-31 Surface Mount Wired NC Door Contact Sensor Alarm Magnetic Reed Switch White 5 Pair

$7.59

QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws

$19.79

2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch,DC 3V to 12v Lamp（White）

$9.99

EPLZON Magnetic Reed Switch Normally Open and Normally Closed NC NO Magnetic Proximity Switch for Door Alarm, Window Safety, DC 5V 12V 24V Light GPS Other Equipment Reed Switch (White, Pack of 5pcs)

$52.9

VictorsHome Magnetic Reed Switch NC NO COM Surface Mount Wired Door Window Contact Sensor with Cover for Home Security and Burglar Alarm Systems MC-31 5pcs

$7.99

Panopticon Tech 3 pcs White Recessed Door Contacts NC Security Alarm Window Sensors with Magnetic Reed Switch. These ¾” Contact Position switches (DCS) Work All Access Control and Burglar Systems

$15

2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch, DC 5Vto12V Light (Black)

$9.99

Panopticon Tech 10 pcs Brown Door Contacts Surface Mount NC Security Alarm Window Sensors WMagnetic Reed Switch. These ¾” Position switches (DCS) Work All Access Control & Burglar Alarm Systems

$27.29

Gebildet 3 Sets NO/NC Black Magnetic Switch Wiring Recessed Door Sensor Hidden Window Contact Reed Switch for Access Control Replace Alarm System

$9.99

EPLZON Magnetic Reed Switch Normally Open and Normally Closed NC NO Magnetic Proximity Switch for Door Alarm, Window Safety, DC 5V 12V 24V Light GPS Other Equipment Reed Switch (Black, Pack of 2pcs)

$9.99

bnafes 4Sets Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device

$9.99

1 pcs White Recessed Door Contacts NC Security Alarm Window Sensors with Magnetic Reed Switch. These ¾” Door Contact Position switches (DCS) Work with All Access Control and Burglar Alarm Systems

$8.39

EPLZON Magnetic Reed Switch Normally Open and Normally Closed NC NO Magnetic Proximity Switch for Door Alarm, Window Safety, DC 5V 12V 24V Light GPS Other Equipment Reed Switch (Black, Pack of 5pcs)

$20

SpzcdZa 2Sets Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device,DC 5V 12V 24V Light

$12.89

1 Mini White Recessed 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

$40

GDQLCNXB 2 Sets MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch

$12.99

10 Sets MC-31B Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security

$9.99

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

$15

PATIKIL Magnetic Reed Switch, 4 Pack NO Wired Surface-Mounted Magnetic Contact Switch for Door Window, Black

$7.99

BESTOONE Motion Sensor Alarm, Long Range Wireless Driveway Alarm, Indoor Home Security System Electric Doorbells, 4 Motion Detector and 2 Alarm, 38 Chime Tunes, LED Indicator

$74.99

HENDUN Wireless Door Alarm with Remote, Windows Open Alarms,Home Security Sensor, Pool Alarm for Kids Safety, Sliding (2 Pack)

$19.59

Ximimark PS-3150 Normally Open Magnetic Sensor Reed Switch magnetic proximity switch Door Contact Safety Security Alarm 3Pcs

$9.99

1 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 Alarm Systems

$35

BokWin 5 Pcs Mico Magnetic Reed Switch Magnetic Door Window Sensor Switch Magnetic Contact Switch (Normally Close)

$7.89

weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch Black

$14.94

VictorsHome Magnetic Reed Switch NC NO COM Surface Mount Wired Door Window Contact Sensor with Adhesive Paper for Home Security and Burglar Alarm Systems MC-38 5pcs

$17.99

HENDUN Wireless Remote Door Alarm, Windows Open Alarms,Magnetic Security Sensor, Pool Door Alarm for Kids Safety, Alzheimer's Apartment Alarm

$24.99

CXPRO 5Pcs Oxygen Sensor Socket Set, Automotive O2 Vacuum Sensor Socket with Spark Plug Wrench Thread Chasers Set, Offset O2 Sensor Switch Removal Tool

$27.99

YXQ 3 Sets MC-31B Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security

$15.99

HONWELL Motion Sensor Light, Wireless Battery Powered Warm White Motion Sensor Lights, Stick Closet Lights, Safe LED Stair Lights, Wall Lights for Hallway, Motion Activated Step Lights (4Pack)

$79.99

GE Wireless Doorbell Kit, 2 Push Buttons Door Bells for Homes, 8 Melodies Door Chime with 4 Volume Levels, Battery Doorbell Chime, Room Doorbell with 150 Ft Range, White, 19297

$19.99

1 pcs NO White Door Contacts (Normally Open) Surface Mount Security Alarm Door Window Sensors.These ¾” Door Contact Position switches (DCS) Work with All Access Control and Burglar Alarm Systems

$15.09