A&H Abrasives 140384, 10-pack, Sanding Sleeves, Silicon Carbide, Spiral Bands, 3x4-1/2" Silicon Carbide 60 Grit Spiral Band Silicon carbide sanding sleeves are less likely to load or clog in use. Specifications: Diameter=3 in, Length=4-1/2 in, Grit=60 Specifications: Abrasive=SILICON CARBIDE, Abrasive Bond=PHENOLIC RESIN, Backing=CLOTH Specifications: Backing Weight=J