【Excellent Material】The automatic spring closer is made of cold rolled steel and zinc alloy. The use of one-piece molding process and electroplating process makes the whole product durable, rust-free and long service life. Package contents: After purchase, you will get a door closer, 4 screws, an adjustment rod and a seal for the protective door. Stainless steel spring door closer is easy to install, no need to buy other parts. 【Adjustable Design】Our internal automatic door closer adopts an adjustable design. You can use the included adjustment rod to insert the rotary hole and adjust the closing force as needed to increase the convenience of closing the door. 【Noise Reduction】The door closer can reduce the noise interference generated when closing the door, close the door slowly to reduce the damage to the door by a violent impact and can prevent you from forgetting to close the door. 【Widely Used】Our door closers for interior doors are suitable for metal doors, fire doors, wooden doors, civil doors and commercial doors, almost any door under 10kg. The self-closing adjustable door is an ideal choice for home, office and hotel room doors., Weight: 0.6393405598 pounds, Manufacturer: Vanillin