Usage Tips:[package include & material]You'll get 2 pcs of punch-free closer with steel rope,Our latest automatic door closer is made of ABS shell which is resistant to oxidation, corrosion, abrasion, weathering, high temperature and long service life [ Super tensile strength]: The high-quality double steel wire rope with diameter of 1.2mm has passed 20000 times of tensile test,The tensile strength is strong and not easy to break [Function]The automatic door closer closes all doors automatically to save heating or air conditioning costs. Avoid standing and opening doors all the time while learning and working to improve learning and productivity. , anti-corrosion, no rust, stable, wear-resistant, weather-proof, hydraulics, quiet, safe and reusable EASY TO USE: Punch-free Automatic Sensor Door Closer, Hole-free adhesive installation,good firmness,does not damage the wall,easy installation,high-temperature resistance. AUTOMATICALLY CLOSE ALL DOORS: Suitable for doors,or doors with a slightly stronger closing force. Doors that open left and right,wooden and metal doors,residential and commercial doors,exterior/inner door closers,fire doors. Please Note: Door closers are not suitable for doors with carpet or too much friction. Pulling force: 500g Colour:black Material:ABS Size:6 x 6cm Package Contents: 2 x Door Closer 1 pack x screws with glue Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.