Process: Seamless Standard: API 5CT Out Diameter:Casing: OD 4 1/2"- 20" (114.3mm-508mm) Wall Thickness:0. 205"- 0.875" (5.21mm-22.22mm) Steel Grade: J55,K55,M65,N80-1,N80Q,L80-1,L80-9Cr, L80-13Cr,C90,C95,T95,P110,Q125 Surface:Corrosion proofing water based paint Uses:Casing serves as well sidewall. Type of End-Finish: PE,STC,LTC ,BTC Heat treatment:Normalized, Quencher+Temper Lengths: API 5CT Casing Range 1 Range 2 Range 3 4.24~7.62 7.62~10.36 10.36~16.00 If you have any interest, please don't hesitate to contact us. Feel free to contact us if any further questions, will serve you as soon as possible.