1.Izilo ezidityanisiweyo zisetyenziselwa ukujonga ubude be-tubing egcweleyo okanye imitya yokutsala, zikwasetyenziselwa ukulungisa ubunzulu besixhobo esisezantsi.
I-2.Standard: API 5CT
3.Size: 2 3/8 ″, 2 7/8 ″, 3 1/2 ″, 4 1/2 ″ nabanye
4.Grade: J55 / K55 / N80 / L80 / P110
5. Ubude: 2FT / 3FT / 4FT / 5FT / 6FT / 8FT / 10FT / 12FT