Exit Devices Commercial Locks > Hardware & Accessories > Exit Devices    s1900 mortise - arrow Chassis: Pressure formed non-ferrous alloy Chassis and end covers: Cold drawn brass, bronze or stainless steel Door Thickness: 1-3/4" (44.45 mm) standard, available for thick doors Handing: Handed. Specify LHRB or RHRB Dogging: Allen type only. Top/Bottom Bolts: N/A Latchbolt: Brass, 3/4" (19.05 mm) throw Crossbar arms: Forged brass and stainless steel Crossbar: 1" (25.40 mm) brass, bronze and stainless steel tubing, .062" (1.5875 mm) thick Crossbar projection: 4-1/2" (114.3 mm) neutral, 2-3/4" (69.85 mm) depressed Opening Height: N/A Fire Exit Hardware-up to: - 4` x 7`2" single door - 8` x 7`2" pairs of doors (with FS1700) Finishes: US3,US4,US10,US10B,US26,US26D.