This set of Testors Hobby Sanding Films is perfect for sanding any model kits you may have. With 5 pieces included, each featuring a different coarseness (150 Grit, 280 Grit, 320 Grit, 400 Grit, and 600 Grit), you'll be able to achieve the level of smoothness you desire. The sanding films are made of a durable film material that is re-usable, making them a great addition to any hobbyist's collection. Measuring 4.25" in length and 3" in width, these sanding films are suitable for a variety of applications and have been made in the United States.