Photo 1 of Magnetic Reed Switch Normally Open and Normally Closed NC NO Magnetic Contact Sensor Alarm Magnetic Door Switch,Proximity Switch for Door Alarm, Window Safety, Black,Pack of 2 with 40 Screws

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Photo 1 of Magnetic Reed Switch Normally Open and Normally Closed NC NO Magnetic Contact Sensor Alarm Magnetic Door Switch,Proximity Switch for Door Alarm, Window Safety, Black,Pack of 2 with 40 ScrewsPhoto 2 of Magnetic Reed Switch Normally Open and Normally Closed NC NO Magnetic Contact Sensor Alarm Magnetic Door Switch,Proximity Switch for Door Alarm, Window Safety, Black,Pack of 2 with 40 Screws