Stop up tools in pneumatic suction cup Stop up tools in pneumatic suction cup is without any tensile belt, circular seal soft mat of ... . Circular design, drainage achieve the best results, diameter 200 mm, drainage area of 300 square centimeters. Small but strong vacuum ... shows vacuum. High quality steel connector. Size: 500 mm, block size: 500/200 mm, inflation pressure: 8 bar, vacuum pressure: -0 ...