... 66,T2-76,T2-86,T2-101 3.TNW,TBW, T6-131,T6-146, Drilling Core Barrel(Double Tube, T2 Series,TBW ... , T2-66, T2-76,T2-86, T2-101, T6-131TBW,TNW,T6-H, T6-101, T6-116, T6-146, T6S-76, T6S-86, T6s-101 ... ,T6s-146 HWF, PWF, SWF, HWAF Triple Tube Core Barrels: T6 SeriesDouble Tube Drilling Core Barrel