3M 6″ 360L DUST FREE IMPERIAL STIKIT SANDPAPER DISC ROLLS – This product earns the 3M Purple color which indicates the latest 3M technology, greatest cost/value and highest quality available. 3M Imperial Stikit Disc Rolls 360L are high-performance discs designed to cut faster and last longer on composite substrates enabling the user maximum usage from each disc. Pre-punched with holes for dust free sanders. Disc is 6″ X 6H. Product is sold by the roll of 125 discs.