【High Quality】The automatic door closer is made of aluminum alloy cast in one piece and assembled with multiple channels, which makes the whole product sturdy and durable. Tension Adjustable: The door closer is tension adjustable and closes slowly or quickly with an adjustable screw, which creates a quiet and comfortable environment. Protects the door from damage by reducing the force with which it closes. Protects the door from damage and reduces noise. Size: approx. 6.5 x 4.9 x 1.2 inches, suitable for door weight 20-40 kg, door width 1000 mm , universal design, right or left swing door, ideal for home, office, hotel room doors. Note: Please measure doors before ordering, suitable for weight of the door from 20 to 40 kg, door width 1000 mm. The closing force of our door closers can only be adjusted to your personal needs based on the fixed or loose round key. 【Many usage scenarios】Automatic door closers are suitable for left and right doors, wooden doors, metal doors, residential