A sponge type file that uses highly durable cloth. Unlike a paper file, a cloth file works great for curved surfaces as well as flat surfaces. Printed on the cloth of each file is the grit as well as a color that corresponds with the grit. Super Fine assortment includes 2 pc of 2000 grit, 2 pc of 4000 grit, and 2 pc of 6000 grit, 2 pc of 8000 grit and 2 pc of 10000 grit. Convenient set for surface polishing. Approximate size of each piece is 35mm x 20mm x 5mm.