Core barrel- single tube/ double tube/ triple tube NQ, HQ, PQ, NQ2, HQ3, PQ3 T2, T6, LTK NMLC, HMLC, NX NW ... sizes in AQ, BQ, RQ, NQ, HQ, and PQ. T2 Series Double Tube Core Barrels: The T2 Series are thin wall double tube core barrel, used for ... = new AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Core barrel assembly NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC, HMLC