Features -Dual Valve, Closing and latching Speed controlled by two separate valves -Needle Bearing Application for Smooth Operation -Back check controlled by separate regulating valve -Optional delay action -High quality Anti-freeze hydraulic fluid for high lubricity and constant lubrication, salt for exterior environment (temperature-30 C to 40 C) -Ul Listed -Precision heavy duty Rack (pinion)& pinion gear -Commercial and residential use, multi size door closer, adjustable spring power -Universal Model offering Versatility mounting applications: regular, top lamb and parallel arm