size:1/2" material:cw617,cw615,DZR,H59... min qty 2000pcs price reconsideration delivery time is 30 days Components and materials:descriptionquantitymaterialsurface treatmentvalve body1 cw615n/h58-3/cw617/dzr…… slinging,nickel platedball 1 cw615n/h58-3/cw617/dzr…… mirror polish,chrome plated o-ring 2 ptfe white color stem 1 cw615n/h58-3/cw617/dzr…… stem o-ring 2 nbr black,hardness70°±5° nut 1 h58 ...