Surface Mounted Automatic Door Closer, Fine Workmanship. Spring Loaded with Adjustable Tension, Adjustable Screws for Slow or Fast Closing. Material: Aluminum Alloy Body + Chrome Steel Accessories; The Support is Made of Chromed Plastic, the Plastic Supports are Used to Avoid the Friction Noise of the Metal (Do Not Over Tighten During Installation). Suitable for Doors Opening to the Left or Right. Door Frames and Doors Must Be Parallel. If the Door Frame is Higher than the Door, You Need to Use Wooden Blocks or Other Materials to Lift the Support and Parallel to the Door Frame. Door Weight ≤ 66 lb, Door Width ≤ 1000 mm, Opening of the Door up to 150 Degrees. Suitable for Office, Hotel Room Doors, etc., Indoor Use. Color: Black. Material: Alloy. Package Contents: 2 x Door Closing Device. Only the Above Package Content, Other Items Are Not Included. Note: Light Reflection and Different Displays May Cause the Color of the Item in the Image to Be Slightly Different from the Real Thing. The Measurement Allowed Error Is +/- 1-3cm.