Bop, Mud Pump, Casing Centralizer manufacturer / supplier in China, offering API 5dp S135 Drill Pipe (200 Kg, PSL-3, NC50, 2 White Bands), API 5dp S135 Drill Pipe (200 Kg, PSL-3, 3-1/2"~5-1/2", NC50), API 5CT Aluminum Pipe Wrench (18" 5000 PSI, NACE MR0175, Shale Gas) and so on.