... and hardness settlings of the copper pipe,steel pipe,Titanium tube,etc.Technial data Sponge Ball Technological Data SheetMaterialNatural RubberLongevityExtended Life ... deg. C, Surface GroundFlammabilityHigh flammable, burns with sootStabilityNot available with acids, alkalis, oils, fats and solvents. High quality rubber sponge cleaning ball for pipeline ...