Standard:API 5CTGrade:J55,K55,N80,L80,P110,Q125Material:seamless casing steel pipe(ERW is also ok)Threaded:BTC,LTC,STCCouplings with PIN and BOXOuter diameter:4 1/2"-20" (114.3mm-508mm)Wall thickness:5.21mm-16.13mmLb/Ft:9.5-40.5Length:Range1(4.88-7.62m) Range2(7.63-10.35m) Range3.(10.36-14.63m) but in fact the range length is 10.36-11.9m,also in fact this kind is used commonly.Certification:API 5CT,MTC (Material test certification)The Third Inspection:SGS,BV,or according to clients needs.Packing:In bundles by steel strips,with thread protector and nylon ring.Delivery time:within 40 days (in stock)WE HAVE BIG STOCK IN STOCK SUPERIOR QUALITY AND REASONABLE PRICE!!! TIMELY DELIVERY!!!9-5/8" L80 47lb/ft Casing Buttress Threaded Range 3