... Cu57%Pb59%)<3,Ceramic Plate,Rubber Oring 3.Life span:500000times ceramic disc for faucetfast open, Brazil, 60g, ceramic disc, brass ... fitting, brass valve core, faucet brass cartridge1 brass body,ceramic ... cycles◊Ceramics Technique requestment of ceramics Sealing face of ceramic discHardness ≥1050HV5 Roughness ≤Ra0.2um Flatness (light ...