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

3X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch,to DC 5V Light

$19.87

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

$7.59

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 (Black-B31)

$9.99

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

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

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

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

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

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

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 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

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

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

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

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

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

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

$9.99

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

$9.99

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

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

$15.99

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

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

$14.99

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

$17.59

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

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

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

$7.59

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

$7.99

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

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

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

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

$7.99

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

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

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

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

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

$9.99

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

$19.79

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

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

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

$7.89

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

$15.59

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

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

$21.99

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

$12.99

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

$15.69

Ohamtes 4 Sets White RC-36 NO Recessed Wired Reed Switches, Door and Window Sensors, Magnetic Reed Switches, Cabinet Light Bar Sensors

$16.99

CZMAG Magnets Reed Switch,10pcs Plastic Contact Normally Closed Magnetic Reed Switch Drop-Proof and Anti-Interference(N/C)

$8.99

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

$11.99

Gebildet 30pcs Reed Switch, Normally Open (N/O) Magnetic Induction Switch, Miniature Reed Contact (2mm x 14mm)

$16.99

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

$7.59

Photoelectric Switch, Through Beam Photoelectric Switch, 5 Pairs 6-36VDC 300mA Sensor PNP Normally Open Switch, Circuit Breaker Panel Safety Switches

$23.22

Gebildet 10pcs 4W 3 Pin Reed Switch Reed Contact Normally Open N/O N/C SPDT, Glass Reed Relay Magnetic Induction Switch (2.5mm x 14mm)

$16.82

Gardner Bender GSW-SK Electrical Door Switch, SPST, Normally ON-Mom, 16A 125V AC, Brass/White

$16.59

Gebildet 6pcs Reed Switch Reed Contact Normally Open (N/O) Magnetic Induction Switch (2mm*14mm), Origianl Japan KOFU OKI Reed Switch

$9.99