... material SSiC 1.we are the pioneer of ceramic bearing in China 2.material is SSiC 3.full ceramic bearing 4 ... balls for acid,alkali,salt,measure pumps,flowmeter.Characterisitic:resistance to strong acid,strong alkali,salt and gas of deleterious, ... especially resistance to hydrofluoric acid,long life,high hardness,resistance to wear. ceramic shaft for pump