... J55, API K55, API N80, API L80, API ... Oil casing pipe)Specification: 114.30-339.73*5.21- 12.19Standard: ... STC, BTC.Tubing: NUE, EUEEnd:Beveled, Square cut. And pipe protection cap specially for casing and tubingSurface:Corrosion proofing water ... to prevent rustPacking: caps on two end of every pipe outer; hexagonal shape bundles wrapped with strong steel strip ... "339.739.65-12.19 API 5CT Casing PIPE