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BNYZWOT Recessed Door Contacts NC Security Alarm Window Sensors With Magnetic Reed Switch. 3⁄4 Inch Door Contact Positio Product Name: Recessed Magnetic Door Swith; Color: White; Net Weight: 115g; Material: ABS10% Off Elzenzhine Door Window Magnetic Contact, Wired Sensor Detector Switches Window Sensing Magnetic Switch for Garage Warehouse Door Fa Magnetic Detecting Switch: This set of magnetic detecting switches is primarily used to safeguard doors and windows, offBest Value WESUA 
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Heavy Duty Wired Magnetic Contacts Roller Shutter Door Reed Switch Sensor with Adjustable Bracket Suitable for roller shutter doors, garage doors. Metal zinc alloy housingTopHomer 
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