... open cartridge We offer various of ceramic discs, used in many kinds of faucets. Material: 95%~96% alumina. Size: According ... is 300, 000 to 500, 000, the density is3.6~3.7g/cubic centimeter, the rigidity is 84~86 HRA, the ... , meanwhile, we can manufacture according to customs' drawings or samples. 1/2#, 3/4# ceramic disc