Our Haixin Group are manufacturer of Drill Pipe, My YM: sukkersu at yahoo com .with API 5D Certification, Pertamina drilling string supplier.We can supply 2 3/ 8" , 2 7/ 8" , 3 1/ 2" , 4" , 4 1/ 2" , 5" , 5 1/ 2" , 6 5/ 8" with Grade E X G S, Price Term: CIF Jakarta Port. Normal Inquiry parameter: OD, Normal Weight or Wall Thickness, Grade.