High quality material: High quality ABS plastic shell and 304 stainless steel wire, anti-oxidation, corrosion resistance, high and low temperature resistance, long service life. Winding roller: There is a turbine spring inside the automatic door closer, which uses the principle of turbine power to pull the cable back, so that the open door is pulled back and closed . Product function: Avoid repeatedly getting up when studying and working, and opening the door to improve the efficiency of study and work. Prevent mosquitoes and flies from entering the room and prevent kitchen steam from entering the living room. Applicable places: Automatic door closer very suitable for home, light office, a shed, a ranch, a home office, etc. for doors or doors with a little stronger closing force. Suitable for most doors: Our punch-free automatic sensor door closer is suitable for most doors such as doors with slightly stronger closing force, left and right opening doors, wooden and metal doors, residential and commercial doors, exterior/interior doors, Fire door. < p>Details: 1. The automatic door closer has a pulling force of 1000g, strong pulling force, good carrying capacity, and can close the door slowly at a constant speed, Wire diameter 1.2mm. 2 .Quick installation, hole-free adhesive installation, good strength, does not damage the wall, easy installation, high temperature resistance. 3. The package contains a total of 2 automatic door closers, enough for you to use them alternately. Specifications: Material: ABS plastic, 304 stainless steel Color: Black Size: 6.3*6.3cm/2.5*2.5inch Package included: 2 x automatic door closer Note: 1. Due to different displays, there may be color differences. Actual color depends on the actual product received. 2. Manual measurement, the size will have a slight error.