... producing sanding belt,sanding paper,sand cloth,jumbo roll,fused abrown,corundum,brown aluminium oxide Description:AP-17 It ... 17 can be used for producing all kinds of coated abrasives products, such as sand paper, cloth, rolls, belts, etc. Typical ... Physical Properties:Color BrownShape Angular, edge sharpCrystal Form Alpha alumina trigonal systemSpecific Gravity 3.92Hardness 2090 Knoop scale, 9. ...