3M02601 Sanding Sponge - Ultrafine (200 Pack). A high density foam hand pad onto which abrasive is coated directly. Used for accessing awkward areas, shaping and feather edging. Available in 5 grades - Medium, Fine, Superfine, Ultrafine and Microfine. Supplied as a box of 20 115mm x 140mm pads. Another innovative sanding abrasive product from 3M. For easy sanding of awkward areas, the five grades of 3M Softback Sanding Sponges offer equivalent finishes from P180 to P1000. The two finest - Ultrafine and Microfine - have key applications in light de-nibbing of water based base coats prior to application of clear coat, and hand sanding primer in critical areas such as styling lines on metallic painted surfaces. (Priced Per 200 Pads).