ALEKO 10BS-MC12S 10 Sets of Magnetic Contact Reed Switch Security Alarm Contact for Doors Windows and Other Applications Install with screws or with super adhesive. 100% brand new. Slim terminal connection design. Ideal for residential and commercial applications. ABS housing. Recommendations in application: wooden door, window, metal doors, gates and any other compatible application. MODEL: BS-MC12S Quantity: 10 Sets