1.Izimbumbulu ezihlanganisiwe zisetshenziselwa ukulungisa ukuphakama kobubanzi obugcwele be-tubing noma izintambo ezilinganayo, zisetshenziselwa futhi ukuguqula ukujula kwamathuluzi wokwehla.
2.Standard: API
5CT 3.Size: 2 3/8 /8, 2 7/8 ″, 3 1/2 ″, 4 1/2 /2 nabanye
4.Grade: J55 / K55 / N80 / L80 / P110
5. Ubude: 2FT / 3FT / 4FT / 5FT / 6FT / 8FT / 10FT / 12FT