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2pcs MC38 Surface Mount Wired NO Door Sensor Alarm Magnetic Reed Switch White
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3pcs Wired Door Contact Sensor NO NC Surface Mount Magnetic Reed Switch Black
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2 Pack Adjustable Wireless Volume Window Door Alarm Sensor for Kids Home Safety

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5Pcs Wired Door Contact Sensor Normally Closed Magnetic Reed Switch 29mmx15.35mm
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Wireless Window/Door Open Entry Security Alarm Doorbell 36 Chime Magnetic Sensor

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5PCS MC-38 Door Window Contact Sensor Magnetic Switch for Home Alarm System US
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Fortress Home Security Store Magnetic Door/Window Contact Sensor Lot of 6 *NEW*

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5pc RC-35 NC Recessed Wire Door Contact Sensor Alarm Magnetic Reed Switch
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PHILIPS 4-Pack WIRELESS WINDOW DOOR ALARM Indoor Home Security MAGNETIC SENSOR
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1-5PCS RC-33 NC/NO Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch
1-5PCS RC-33 NC/NO Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch

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