Casing in accordance with API Spec 5CT (Seamless).Grade:N80,K55,J55,P110.L80 Wall thickness:3.18mm-14.22mm. Length:R1/R2/R3 Our Casing and Seamless steel tubes for oil casing and tubing in oil wells.Grade:N80,K55,J55,P110.L80.Nominal Size:4 1/2"-13 3/8" .Have Threaded and coupled.Short round thread.Long round thread.Buttress thread. Casing