sponge ball for cleaning concrete pump size from 1inch-8inch, soft, medium, and hard available NameConcrete Pump Cleaning BallSizeDN25(1inch) soft ,hard ,medium ... concrete pump truck in construction work Service Brand Schwing, PM, Kyokuto, CIFA, Sany, Zoomlion, and so onTechnical Details for Sponge Ball 1 ... Heat Resistance : + 80 0CCold Resistance : - 40.0C sponge ball for cleaning concrete pump