AL2O3 DISPOSABLE ALUMINIUM OXIDE Extremely pure abrasive media, selected for the preparation of the composite retention wall and for the mechanical pickling of the bonding surfaces. Available in 5kg cans or in 25kg sacks. Available types and grainsize: AL2O3 60 (250µm) Coarser grain suitable for deep carving on the retention wall AL2O3 120 (105µm) Coarse-medium grain for composite and resin AL2O3 150 (95µm) Medium-fine grain for resin and ceramics. AL2O3 180 (80µm) Fine grain for ceramics AL2O3 270 (50µm) Very fine grain for accurate modelling operations