The Evolution Mini Belt Sander Belts are ideal for wood and plastics. The type of grade depends upon the coarseness (particle size) of the grit embedded in the cloth. As an approximate guide; The 80 grade belts are for sanding solid wood, chipboard and paint removal. The 100 grade belts are suited for plastics and acrylics and 120 grade belts are ideal for veneered wood. The coarser paper grades remove the unwanted material faster and with less effort. There are 3 packs available to choose from: 80 grade, 100 grade and 120 grade. Eack pack contains 3 mini sanding belts. Size: 303 x 40mm.