Weight: 0.35kg Size: 116*167*32mm Color: as shown Material The automatic door closer is made of high quality stainless steel and zinc alloy, which is durable and not easy to deform. The surface is with Color electroplated, which is not easy to rust and has a long service life. Installation Method 1. Fix the main body of the automatic door closer with screws, 2. Screw the adjustment rod into the main body, 3. Rotate the adjustment rod backwards to expose the main body's other threaded holes, 4. Screw the accessory with wheels into the main body. Noise reduction The automatic door closer can close the door slowly to reduce damage to the door from a violent impact, it can reduce the noise when the door is closed and it can also prevent you from forgetting to close the door. Widely Used The automatic door closers are ideal for home, office and hotel room doors. The automatic door closer is suitable for almost all doors weighing less than 40kg and door width less than 1000mm, such as: Metal doors, fire doors, wooden doors, civil doors and commercial doors.