Industrial vacuum suction cup: powerful round vacuum suction cup, diameter 210 mm. High performance vacuum suction cups, easy operation of air pump compressor. The suction cup is only suitable for smooth and non-porous surfaces, which is efficient, practical and economical. High-quality material: The thickened handle is made of engineering ABS, ergonomically shaped, non-slip and durable . High-quality rubber pad, 210mm wide suction cup, firm and comfortable, with very good anti-slip effect. The suction cup has strong suction force and does not leak air. Within 150 kg (330 lbs): The powerful suction cup can hold any 150 kg (330 lbs) suction cup vertically . For heavy goods, the number of suction cups can be configured accordingly to evenly distribute the load capacity. Suitable for smooth surfaces, especially large glass surfaces, ceramic tiles, wooden floors, stone, plasterboard, furniture, metals, plastics, etc. Easy to use: specially developed for curved surfaces. The suction cup provides plenty of space. It can lift curved objects like bathtubs and washing machines, and can also be used on a flat surface. All you need to do is place the suction cup on a smooth or flat non-porous surface. Then pull the vacuum cleaner into the suction cup until the red warning line disappears. Easy and safe: press the air pump to inhale, press several times until the red line disappears, let it sit for 20 seconds and slowly lift the object. Convenient draining, easy operation, press and hold the drain valve, the red line will come out to remove the adsorbed material.