A&H Abrasives 155984, Rolls, Zirconia Alumina, (y-weight), 3x70ft Zirconia Alumina 50 Grit Roll Save money by cutting you own abrasive drum sander wraps. Specifications: Width=3 in, Length=70 ft, Grit=50 Specifications: Abrasive=ZIRCONIA ALUMINA, Abrasive Bond=PHENOLIC RESIN, Backing=CLOTH Specifications: Backing Weight=Y