rubber sponge ball Diameter:6mm-175mm used for clean the condenser of power plant and pipe cleaning,and sea water desalting. 1. ... . has an annual manufacturing capacity of 10000 ton molecular sieves & activated alumina, 30000 m3 of varieties types of chemical packings(metal,plastic,ceramic), 5000 ... and fully. Please contact us for your requirements. rubber sponge ball size: 17mm, 19mm, 20mm, 21mm, etc