Seco-larm SM-226L-3 Magnetic Contact Overhead Door Mount Garage Open/Closed Loop

Used for overhead doors in both industrial and residential situations where a wide gap is present. Adjustable to fit most door-channel widths. Switch contained in curved low-profile cast-aluminum housing for surface mounting on garage floor. Magnet enclosed in gray ABS case on L-bracket. 24" (61cm) wire leads enclosed in armored cable