Features: Quality materials : The material of the automatic door closer is made of quality steel wire and the surfaces is made of high-quality plastic, which is corrosion and wear resistant and has a long service life. Smoothness: It does not stick when it rotates at high speed, which significantly reduces sticking, jamming and noise. The movement has a service life of about 20,000 cycles. Multifunctional : Multifunctional automatic door closer. Prevents the door from repeating hitting while learning and working, improves learning and work efficiency and prevents fly from entering the room. Quick installation: Adhesive installation, no need to drill holes, high strength and no damage to the wall, easy to install and heat resistant. Wide range of applications : suitable for all types of aluminium doors, wooden doors, two-way sliding doors, glass doors, fly screen doors, etc. Suitable for homes, offices and various shops. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Tensile force: 1000G Wire length: 1.2m Wire diameter: 1.2mm Package List: 1 Set Non Punch Automatic Sensor Door Closer