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