3M 413-400 SandBlaster Flexible Finishing Pad 3.7 in x 9.25 in (9.3 cm x 23.5 cm) 400 grit, Rectangle, 2 sheets per pack3M is a diversified technology company serving customers and communities with innovative products and services. 3M is committed to actively contributing to sustainable development through environmental protection, social responsibility and economic progress. Specifically designed for finishing, the 3M; SandBlaster; flexible finishing pad conforms to any surface shape. May be used in place of any 400 grit (fine) sandpaper. For the most consistent results, use with the comfortable SandBlaster sanding to3M 413-400 SandBlaster Flexible Finishing Pad 3.7 in x 9.25 in (9.3 cm x 23.5 cm) 400 grit, Rectangle, 2 sheets per pack Features:; High performance flexible final sanding finish pads; Unique Micro-cut technology; Use for final finishing to smooth a surface prior to applying a final finish; 400 extra fine grit; 3-2/3" x 9-1/4"