1) Sizes: OD 2-3/8" - 20"; 2) Grade: J55, K55, N80,L80,P110,Q125; 3) End: BTC,STC,LTC; 4) Length: R1,R2,R3; 5) API 5CT. We deal with the Oil Seamless Casing Pipe in various different sizes,grades and Couplings.API cert. is available. Seamless Oil Casing Pipe,API