Door closers reduce noise disturbances when closing doors, close doors slowly to minimise damage caused by slamming and prevent you from forgetting to close the door.Feature:This hydraulic is made of commercial grade aluminum alloy, hydraulic operated, totally automatic closing, speed adjustable, gives you an easy and life, protects your door and lock.Adjustable spring hydraulic has 2 valves independently control the closing and latching speed. You can control the closing speed as you like to suit the environment in which the closer is placed.Automatic comes with a detailed and clear installation manual and install fittings, provide you simple and smooth installation.Specification:Material: Commercial Grade Aluminum AlloyDoor Open range: 180º MaximumPackage Included:1 x 1 x Installation PackNote:Please allow 0.5-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!