Seco-Larm SM-226LQ Pack of 2 Enforcer Overhead Door Magnetic Contact Switch, 2-3/4 Inch Gap, Closed Loop Security Sensor, Weatherproof IP66 Industrial Door Contact with Armored Leads

["Wide gap detection: 2-3/4 inch operating gap designed for overhead and roll-up doors","Closed loop circuit: Normally closed configuration for reliable security system integration","Weatherproof design: IP66 epoxy-sealed housing for indoor and outdoor installations","Heavy-duty construction: Cast aluminum switch and ABS magnet housing for durability","Armored cable leads: 24 inch stainless steel armored wire protects against damage","Adjustable mounting: Fits most door-channel widths for flexible installation","SPDT reed switch: High reliability contacts with gold under-plating for long life","Industrial application ready: Ideal for warehouses, garages, commercial and industrial doors"]