Ideal for finishing and polishing a variety of materials, these sheets can be used for wet or dry sanding, and are washable and reusable. Includes fine to micro fine: 320, 400, 600, 1000, 2000, 4000, 6000 & 12,000 grit. Each sheet measures 3-1/2 x 8′ 8.8 x 20.3cm.WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov