Feature:1. Vacuum Suction Cup: Specially designed for curved surface, this suction cup can easily lift heavy objects and flatten the surface.2. 220kg Lifting Force: With 8in large diameter and strong rubber pad, enables a great lifting capacity up to 220kg for easier lifting.3. Safety Red Line: The red line indicator warns the user of any vacuum loss. When a red line appears when lifting, just use the thumb to pump the plunger without removing the object from the surface.4. Easy to Operate: The check valve allows re pumping without lossing residual vacuum, and the release valve stem allows rapid and complete release.5. Wide Application: Suits for lifting and handling materials such as glass, aquariums, plastics, engine valves, sheet metal, slate, etc.Specification:Item Type: Vacuum Suction CupMaterial: ABS + Rubber + MetalFunction: Vacuum Suction CupColour: BlackSuction Cup Size: 8inMaximum Lifting Capacity: Approx. 220 kg / 485 lb. Working Temperature: -20~60.Package List:1 x Vacuum Suction Cup1 x Sealing Washer1 x Washer1 x Sealing Ring1 x Wire HookNote:Pay attention to lifting the adsorbed heavy objects to ensure that the adsorption is completed, so as to avoid the heavy objects falling during the lifting and causing injury.