Diablo 20 pack of 9 x 11 220 grit sanding sheets Premium 9” x 11” sanding sheets include breakthrough innovations that improve performance, extend sanding life and increase productivity Premium aluminum oxide blend a superior quality formulation designed for fast material removal and long sanding life ClogShield a high performance stearate coating reduces pitch buildup and clogging for maximum productivity EnduraBond a specialized high strength resin provides superior grittobacking bond for extreme durability