Abrasive 3M ™ Softback Mineral Oxide Abrasive Softback on a foam support. Benefits : For dry sanding. Adapt to all forms of sanding parts, thus preventing an excessive removal of matter. (E.g. when sanding edges or songs) With an anti-harm treatment. Applications :: For sanding difficult to access places. To work on all types of materials and all applications. Dimensions: 115 x 140 mm Grain : 03808 Middle 03809 End 03810 Super end 02601 Ultra fine 02600 MICRO End.