Single jaw suction cup for 8 inch vacuum hand pump: large diameter rubber suction cup, strong suction, strong practicability and durable. The suction cup is cold and heat resistant and also comes with a dust filter. Press operation, deep sealing, strong sealing, no leakage. The thickened air release valve can effectively protect the disc body. High-quality material: The suction cup is made of sturdy handle and high-quality natural rubber, which has a capacity of higher load. The vacuum suction cup can hold each 220 kg suction cup vertically. If the transported goods are heavy, the number of suction cups can be configured appropriately to evenly distribute the carrying capacity. Easy to use: place the suction cup on a clean, smooth, non-porous surface, press on the pump until the suction cup is firmly attached to the suction surface, then you can lift the granite, glass, etc. If the vacuum level drops, press the pump again. When you are finished, simply press the release valve stem and the pump will come out and you can easily remove the suction cup. Wide application: suitable for all smooth non-porous surfaces, such as marble , ceramic tiles, stone, granite, mirror, glass, plastic, metal, etc. Help us install, lift and move heavy objects more easily. Precaution for use: Before use, make sure that the surface of the adsorbed object is clean, free from water and d 'oil. If you have any questions, please feel free to contact us by email, we will provide you with professional services. Package list: Name: Sucker Material: rubber + metal Packing box: carton packing list: 2 * Suction cup 2 * Instructions 2 * protective cover