1. The product specifications are from 2-3/8 to "20", and the steel grade is from J55 to Q125, covering all full series and steel grades.
2. The raw materials used by our company are all purchased from large and well-known domestic steel mills.
3. Technical Standard: API 5CT 9th or API 5CT 10th, API 15B or API 16B, according to the customers' request.
4. Thread Type: Customized Thread.