DND Mini Buffer – Purple/White 80/100 Grit SPECIFICATION: GRIT: 80/100 (Medium/Coarse)GRIT COLOR: Purple/with White Grit2-WAY BUFFER (2 SIDES)DIMENSIONS: .47 in x 1.37 in x 0.98 in DESCRIPTION: Premium Buffers are made with the sharpest and strongest abrasive grains available. We guarantee our buffers will not crack or break. Feel the difference! Buffers are made from sterilized medical grade foam.What do the grit numbers mean? The grit of buffers is a rating of the size of the abrasive materials on the buffer. The higher the grit number, the finer the abrasive, which creates smoother surface finishes. Lower grit numbers represent coarser abrasives that scrape off materials much quicker. Type Grit Super Fine 220 Very Fine 180 Fine 150 Medium 100 Coarse 80 Extra Coarse 60