Feature: 1. Designed for Curved Surfaces: Specifically designed for curved surfaces, this glass suction cup has a larger cup space, making it ideal for lifting objects like bathtubs. It can also be used on flat surfaces with extra effort to ensure sufficient vacuum for lifting heavy loads. 2. High Load Bearing Capacity: With a load capacity of 440LBS 200KG per heavy duty vacuum suction cup, the 8 inch suction cup is made of high elasticity rubber for strong and secure suction. The industrial grade vacuum pump provides a stronger suction force, ensuring long lasting vacuum without leakage, saving time and effort. 3. Easy Operation: Press the handle to attach the suction cup, pump repeatedly to create vacuum until the red line disappears, indicating a secure attachment. After use, the quick release valve is easy to operate for automatic deflation. 4. Red Line Indicator for Vacuum Loss: The red line indicator warns users of any vacuum loss during lifting. Simply press the plunger with your thumb to release the cup without removing it from the surface, ensuring convenient access. 5. Wide Application: Made with vacuum material, this glass suction cup can adhere to various materials. The internal texture of the suction cup creates optimal conditions for vacuum, making it suitable for glass, tiles, stones, furniture, metal, large tiles, cabinets, car windshields, sunroom construction, engine valves, household appliances, plasterboard, and other smoothly surfaces. Specification: Item Type: Glass Suction Cup Material: ABS, Rubber Load Capacity: Approx. 200kg / 440lbs Application: for Car Windshield, Tile, Granite, Floor . Package List: 2 x Glass Suction Cup 2 x Dust Proof Cotton 2 x Dust Proof Cover 2 x Dust Proof Cover Sealing Gasket 2 x Iron Hook