... Blue, Green, etc.ApplicationCleaning the pipeline of concrete pump and concrete pump truck in construction work equipment.Sponge Ball ... CBreaking Elongation440%Abrasive ResistanceGoodTolerance-0.0mm, 1.0mmElastic to-40 deg. CMaterialVulcanized at 155 deg. C, Surface GroundFlammabilityHigh ... more than 10 years, covering spiral wrap,rubber hose,rubber seal strip,gasket,rubber molding products, etc. ...