Plug Valve, Gate Valve, Choke and Kill Manifold manufacturer / supplier in China, offering API 16c Fmc/Spm 4" Style 10 F*M Swivel Joint, Threaded Fig Hammer Union 1502 1003 602, API 6A 5-1/8" 10000psi Drilling Adapter Spools or Spacer Spools or Riser Flange and so on.