Norton 05386 9-Inch X 11-Inch 3X Assorted Grit Sand Paper, 4-Pack Product Description Premium heat-treated aluminum oxide abrasive lasts 3 times longer and cuts 3 times faster than conventional aluminum oxide products. From the Manufacturer Premium heat-treated aluminum oxide abrasive lasts 3 times longer and cuts 3 times faster than conventional aluminum oxide products. Features Exceptional performance on all surfaces and coatings Flexible, fiber-reinforced backing for excellent life, flexibility and tear resistance when folded Non-Pigmented, water-based stearate (anti-clog) coating for best resistance to clogging and loading during sanding No color dye in coating process so no chance of color transfer to work piece No finish contamination USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.