The hydraulic door closer is made of commercial grade aluminum alloy, hydraulically operated, fully automatic closing, adjustable speed, ensure you an easy and safe life, protect your door and lock. Adjustable fire doors for all types of medium doors - right and left open doors, wood or metal doors, residential and commercial doors, exterior / interior door closer, fire doors. The door and the door frame must be on the same plane and less than 5 cm / 1.97 ". The Commercial door closer applies to the door weight between 25 and 40 kg, but not for light doors, door width between 60 and 120 cm (23.6 "- 47.2"), door opening range: 180 maximum. Antioxidant, anticorrosion, rust-free, stable, resistant to abrasion, weathering, hydraulic stress, silent and safe, with quick-setting screw, tested by 500,000 cycles, probability of leakage 'oil less than 1/1000.