This pack of 50 Norton Abrasives DryIce Multi Air Cyclonic NorGrip Sanding Discs is a great addition to any automotive shop's supplies. With a size of 6 inches and a grit of 400, these blue discs are perfect for sanding surfaces to a smooth finish. The discs are dry and come with a manufacturer part number of 07784. Although these discs are not new, they are still in great working condition and ready to be used. Purchase with confidence knowing that you are getting high-quality sanding discs from a trusted brand.