Adjustable latching speed and closing speed - Compatible with left-hand and right-hand doors - Maximum 180° opening angle - Tri-pack for regular, parallel arm and top jamb installation - Precision cast aluminum alloy housing - Rack and pinion mechanism - Non-critical thermostatic valves - High quality non-gumming and non-freezing hydraulic fluid - CUL and UL listed - 5 year limited warranty on finishes