1-1/8"x21" - P400X - P400 - 400 grit - P Graded which provides more uniform finish than traditional Cami graded products - Sharp silicone carbide grain cuts fast while minimizing heat - Design for use on Glass, Mirror and Stone - Full resin on resin bond holds up to heat and moisture - 100% polyester waterproof Y backing. Straight joint for optimum performance on narrow belts. Packed 10 belts per box - 50 belts per case - Manufacturer: Sungold