Features: 1000g tension, suitable for door or door with strong closing force. It can prevent mosquitoes and fly from entering room, and mice will not have the opportunity to enter room to steal , which can prevent kitchen fumes from entering the living room, which is effective Isolate the moisture and stale air from the bathroom. Make from ABS shell and steel wire, stable, wear resistant, weather-proof, hydraulics, quiet, safe and reusable. Suitable for screen door, invisible door, iron door, security door, aluminum alloy glass door, interior door, sliding double door, office door, door that open left and right, kitchen door, bathroom door, wood and metal door, residential and commercial door, exterior/inner door Closers, fire door. Easy to install: Just tear down the door Closers sticker and hook sticker to install where you want, ( waiting for 24 hours to increase viscosities will be best after pasting the sticker) then hangs the steel wire rope on hook. Also you can use the screws (come with product) to install. Specifications: Materials: ABS Color: White/Black Size: about 63x63x16mm/2.48x2.48x0.63inch Package Includes: 1set Automatic Door Closers note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.