3M Paper Sheet 346U, Aluminum Oxide, 9" Width x 11" Length, 36 Grit, Gold (Pack of 50) Tough aluminum oxide abrasive cuts fast and performs well on many surfaces Anti-loading open-coat feature enables longer use before replacement Strong, D-weight paper backing supports aggressive sanding Sheets are conformable to various workpieces and usable by either hand or machine Sheets come in a number of sizes to accommodate various applications