rubber sponge ball Diameter:6mm-175mm used for clean the condenser of power plant and pipe cleaning,and sea water desalting. 1. ... for cleaning the softness and hardness settlings of the copper pipe,steel pipe,Titanium tube,etc.About us:Jiangxi Voda chemical co ... promptly and fully. Please contact us for your requirements. China rubber sponge ball for pipe cleaning size: 17mm, 19mm, 20mm, 21mm, etc