... assembly, inner tube head assembly, over shot, hoist plugs, drill rod, casing pipe etc. With ISO certificate & quality control. 1.5m ... and 3m Drill rod & Casing pipe: Size Available: "Q" series: AQ, BQ, NQ, ... contact with us if you need detailed speicifations or catalog. Drill rods & Casing pipes Core barrel assembly & inner tube head assembly Surface ...