SunMight 01314 6" 320 Grit PSA Discs (No Hole) Open coat stearated. Excellent cutting performance. Longer lasting life with powerful durability. Perfect sanding surface. Especially excellent for contour sanding without folding. Special resin over resin delivers the strongest adhesive bond to prevent shelling. Long-lasting without clogging. Sunmight Film creates a strong and even surface film backing that allows better surface finish and longer life. Great for corner and edge sanding without problems with tearing. Sunmight Film's premium grain and strong resin bond provide faster and sharper cutting performance and longer life. With uniform mineral coating on perfectly even surface, film works better than paper, resulting in an outstanding finish without deep scratch marks. Specifications: Grit: 320 Grain: Premium Aluminum Oxide Backing: Polyester Film Bond: Phenolic Resin Coating: Open Coat Size: 6" Color: Green No holes. 100 discs per roll. For use on automotive, marine, wood, metal, and aerospace Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.