Standard:API 5CTGrade:J55/K55/L80/N80/P110/Q125Thread:BTC,STC,LTCAs a Petroleum equipment manufacturer?s parent company, we specialized in supplying seamless pipes(Casing, Tubing, Crossover) with API certificate.Our customer covers CMC(America),Canada, and other smaller distributors in more than 20 countries.Certainly we hope to find a way to cooperate with you