... ,Ceramic Plate,Rubber Oring 3.Life span:500000times Slow Open Brass CartridgeCeramic Cartridge,brass valve core,sanitary fittings,head ... work,ceramic discfast open, Italy, 65g, ceramic disc, brass fitting, brass valve ... 3Mpa Life test 500,000 open and close cycles◊Ceramics Technique requestment of ceramics Sealing face of ceramic discHardness ≥1050HV5 ...