Excellent Material: The auto 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, rustless 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. The 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 noise. sound interference generated when closing the door, close the door slowly to reduce the damage to the door caused by strong 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 all doors under 10 kg. Self-closing adjustable door is an ideal choice for home, office and hotel room doors. Product : 1) The wheel of the adjustable self-closing door is made of nylon, smoother than traditional plastic, so the door closes smoothly and quietly. 2) The internal soft closing of the door closer can automatically close the door, and the closing speed is adjustable to protect your door and your lock. 3) The spring door closer adopts universal design, can open the door on the left and on the right, suitable for the door of family, office, hotel room. 4) The automatic door closer will reduce the force when closing the door to protect the door from the damage and reduce noise. 5) Door closer for interior door is very suitable as a gift for relatives, colleagues, friends, especially for those who forget s often to close the door or close the door strongly. Product Specifications: Material: Steel, Zinc Alloy, Nylon Color: Black Size: 160 * 126 * 34.3 / 6.3 * 4.96 * 1.35 inch Contents Package: 1 * Door Closer Sold by Briday Store