Made in CA 6 In. Paper Disc 400, PK/100 Premium P-graded, heat treated, toughened aluminum oxide abrasive delivers superior life, fast rate, consistent finish.Unique fiber reinforced, flexible B-weight latex saturated backing provides 50% - 60% improvement in tear strength while retaining flexibility.Water-based, non-pigmented stearate No-Fil coating and open coat provide maximum load resistance and no color transfer to work.Better choice for high-performance fine grit dry sanding, finishing, and micro-finishing on all materials; hook and loop back for easy disc mounting and changing 662611-31556