sanding disc sanding disc, fibre disc 1. 0.8 mm Vulcanized fiber disc2. Material: Aluminium oxide, silicon carbide, Zirconia3. Size: 4", 4.5", 5", 6", 7",9"4. Abrasive Grain Size: 16-1205. Grit: p16-206. Hole: round or cross7. Packing: 25pcs in a shrinked film, 25/50 pcs in box, then standard export carton sanding disc