Adjustable Spring Automatic Door Closer for Fire Door (Black) 1. Material: Made of aluminum alloy, strong and durable, not easy to rust. 2. Adjustable resistance: adjustable screws, adjustable tension, slow or fast, can be adjusted according to your living environment. 3. Automatic door closer: automatic door closing, no manual design, no noise. 4. Applicable space: universal design, used for right or left doors, suitable for family, office, hotel room doors. 5. Solid arm: Thick solid arm, closing the door more smoothly. 6. Easy to install: No slot needed, easy to install. Features: Product name: Automatic door closer. < p>Color: black, silver. Material: aluminum alloy. Dimensions: approx. 168 x 138 x 127 x 32 x 35mm (total length x arm length x base width x base height). Contents: 1 automatic door closer. 4 screws. Note: 1. Due to the lighting and individual monitor settings, the item's color may be slightly different from the pictures. 2. Since the measurement is taken by hand, the dimensions shown may vary by 0.5-2cm. Note: The data is all measured manually, please allow 1-3cm error , due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.