Process: ERW and Seamless Standard: API 5CT Certificate: Tubing: LTC, STC, BTC, VAM.Tubing: NUE, EUE. Out Diameter: Casing: OD 4 1/2″- 20″ (114.3mm-508mm) Tubing: OD 2 3/8″ – 4 1/2″ (60.3mm-114.30mm) Wall Thickness: 0. 205″- 0.635″ Length: R1(4.88mtr-7.62mtr), R2(7.62mtr-10.36mtr), R3(10.36mtr or longer) Steel Grade: H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, Q-125 Surface: Corrosion proofing water based paint End: Beveled, Square cut.