High quality materialThe automatic door closer is made of stainless steel and zinc alloy. It uses a one-piece molding process and multiple assembly processes to make the whole product durable and solve the problem of loud closing noise. Door Closer PackageDoor Closer Package, you will get 1 x automatic door closer + 4 x screws + 1 x key inside + 1 x door protection seal. The auto door closer comes with full accessories, easy and convenient installation, simple and labor-saving. Optimized DesignThe auto door closer adopts double spring structure and nylon roller design to reduce the resistance when closing the door , protect the door from damage and reduce noise. Features of Door CloserThe door closer has the adjustable properties independently of left and right. The hex screwdriver allows turning and adjusting the force; universal design for left and right swing doors, ideal for home, office and hotel doors. Product advantages: 1. Quiet design. 2. Close door automatically. 3. Double spring structure. 4. Nylon Wheels 5. The intensity is adjustable. 6. No matter left or right. Description: Product name: Aluminum alloy door closer. < /p> Material: zinc alloy. Color: black. Suitable for door weight 20-40 kg. Maximum door width: approx. 1000 mm. Area of application: families, wooden doors etc. Contents: 1 automatic door closer. 4 screws. 1 adjustable wrench inside. 1 protective door seal.