k55 oil tubing 1.J55,K55,N80,L80,P110 steel grade 2.OD:60.3-114.3mm,WT4.83 ... length:R1,R2,R3 k55 oil tubing1.J55,K55,N80,L80,P110 steel grade2.OD:60.3-114.3mm, ... .75H,J,L,N,C,T12.75EUShandong Jialong Petroleum Pipe Manufacture Co.,LtdContact: Richard WangTel: 0086-13963547776 Jialong ... has grown to represent many further aspects of the steel pipe industry above and beyond the imagination of the people. ...