API Spec 5CT HS Standard Water Gas Well Tube H40 J55 K55 L80 R95 N80 C90 T95 P110 Q125 V150 Oilfield Tubing Pup Joint Nipples Couplings Seamless Oil Casing Pipe US$580.00-650.00 / Ton Hot-Rolled Round-Precision Oil/Gas Q235B/A7...