A&H Abrasives 878596, 10-pack, Sanding Sleeves, Aluminum Oxide, Spiral Bands, 1/2x4-1/2" Aluminum Oxide 80 Grit Spiral Band The best spiral bands abrasive sleeves anywhere. Specifications: Diameter=1/2 in, Length=4-1/2 in, Grit=80 Specifications: Abrasive=ALUMINUM OXIDE, Abrasive Bond=PHENOLIC RESIN, Backing=CLOTH Specifications: Backing Weight=X