copper beer ball valve Specification: 3/8'', 1/2'', 3/4'', 1'', 1 1/4" , 1 1/2" , 2" , 3" , 4" CE, Rohs, ISO9001: ... Stem Sealing Ring: NBR 70. 2. Size3/8'', 1/2'', 3/4'', 1'', 1 1/4" , 1 1/2" , 2 ... " , 3" , 4" 2. SurfaceYellow brass color.Nickel platedChrome plated. 3. PointThread: ISO228 (Equivalent to DIN259 and ... ROHS, ISO9001:2000 5. Guaranty3 Years Guaranty. copper beer ball valve