Brass, integrated industry and trade, quality control, CCC certification, Brass Valve All copper gate valves: 4mm, 6mm, 1 inch, 2 inches, DN15 water meter, DN20 tap water, 25 total valve, 32 valve, 40 copper gate valve, 50refrigeration parts, valves, processing according to customer drawings, ISO 9000 certification, valves, plumbing hardware, pipe fittings, compression equipment parts, filtration equipment