3M 7 Micron Trizact Abrasive Discs - 35mm dia. 500 Discs Per Roll. Ideal for removing small imperfections such as dust and dirt nibs from very small or difficult to reach areas. Its scalloped shape eliminates gouging on contours. Use with water on a dedicated Finesse-it™ Hand Sanding Block, 3M 13441. (Priced per Roll).