4"x132" P400x - P400 - 400 grit - P graded which provides more uniform finish than traditional Cami graded products - Sharp Silicon 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 weight backing. Wave joint for bump free sanding. - Packed 9 belts per box. 45 belts per case. - Manufacturer: Sungold.