One Box 20 Sheets 3M 051131-02602 SANDING SPONGE 114mm x 139mm SUPER FINE Grit 320 - 600 3M Sanding Sponges make sanding curves, contours, corners and hard to reach areas faster and easier. Are ideal for both flat and slightly contoured surfaces - such as raised panel doors, cabinets and windows Have a durable foam construction which makes them easy and comfortable to hold