... Tubing Grade: J55 L80-1 N80 C90 T95 P110 Length: R1, R2, R3 Size: 2 3/8" - 20" BTC, LTC STC ... a well.Grade: J55 L80-1 N80 C90 T95 P110Length: R1, R2, R3Size: 2 3/8" - 20"Wall thickness from 4mm ... tons according to the specified size and grade API 5CT R1/R2/R3 BTC/STC/LTC Seamless Casing