Diameter 6″ | Grit 80+ | 50 Discs Per Roll 3M Cubitron II Net Discs combine patented 3M Cubitron II precision-shaped grains with a net backing pattern to deliver performance nobody matches. See less dust. 3M Cubitron II Net Abrasives help dust extractors achieve their best possible performance. The 3M Hookit attachment makes installing a new disc quick and saves a partially-used disc easily. Prolong the life of your sander’s backup pad and maintain consistent attachment with the use of a protection pad or pad saver.