3. Steel Grade: API Spec 5CT J55 K55 N80 L80 P110 C95 4. Specification: API Spec 5CT & API Spec 5B;
5. Feature: Nanoscale Titanlum-containing Compound Coated, high corrosion resistance and long running life. 6.Dimensions and their tolerances of tubing round-thread as per API spec 5B Protection of Thread: Thread protector