... " 2.Brass:57-62%,Ceramic disc,Rubber O-ring 3.Life span:500000times brass ceramic disc tap cartridgefast open, India , 60g, ceramic disc, brass fitting, brass ... .822.9 28.0 32.5 36.0 38.7 40.6 42.4 43.3 47.6 Fitting method Screw ... Sealing face of ceramic discHardness ≥1050HV5 Roughness ≤Ra0.2um Flatness (light band)We mainly produce metal products,brass cartridges, faucet fittings,brass ...