Machine, Oil Equipment, Mud Pump manufacturer / supplier in China, offering 28-21 API 7" Shaffer Type Packing Element for Annular Bop and RAM Bop 5000 Psi, API 16A Bop Packing Part Rubber Diverter, API 16A Blowout Preventer Parts Bop Rubber Annular Bop Packing Unit and so on.