... rubber sponge ball Diameter:6mm-175mm used for clean the condenser of power plant and pipe cleaning,and sea water desalting. 1. ... cleaning (2) Sea: Sea water desalting (3) Pipe and machinery cleaning: used for cleaning the softness and hardness settlings of the ... met promptly and fully. Please contact us for your requirements. China rubber sponge ball for pipe cleaning size: 17mm, 19mm, 20mm, 21mm, ...