These color coded Micro-Mesh Pads are great for turning pens and small projects. These flexible pads can be used on wood, acrylic, corian and many other surfaces. They can be washed after use to extend life. Each pad measures 1/8"x 3"x 4". They have abrasive on both sides. Each kit includes 9 pads ranging from 1,500 to 12,000 grit.