1. We are good suppliers from China 2.BGT, HSM, TPCQ, TPFJ, TPEX, 3.Excellent quality . Premium Connection StandardAPI 5CT and technical agreementGradeJ55/K55, N80, L80, L80-9Cr, L80-13Cr, C90, T95, C95, P110, Q125,V150 etcThickness2.87 mm –50 mmOuter Diameter1.050 inch –20 inchPlace of OriginChinaApplicationGas tight connection, High torque ConnectionConnection typeBGT, HSM, TPCQ, TPFJ, TPEX, ...