Check the listing for details. Mounted Switch Sensor Wide Gap Contact Security Alarm System Outdoor Gate. Condition: New. Listed at 14.00 USD. Single Switch Contact, SINGLE Magnet included with contact (SINGLE SET) When the magnet is next to the switch in the normal position, the loop is closed. When the magnet is pulled away the loop opens.Wide Contact Switch for Overhead Shutters 3″ Long 2 Core 22 AWG PVC Cable • Screw Mounting Operate Gap 2″ (50mm) min. Switch Mounted on Z Bracket For Convenient Mounting Message with questions BEFORE you purchase. Wide Gap Surface Mount Contact SwitchScrew MountingPlease ask if you need something other than what is listed, for instance: security systems accessories, cables and sensors and contacts.Alarm Dealers are Welcome. Operate Gap 2" (50mm) MAX. Magnet must be under 2 inches to trigger contact. ONLY one bracket is included.