PSA Disc 8 In. 80 Grit Z/A Norton Bluebags PSA discs are ideal for sanding badly filler Orson grain micro-fractures to improve cut rate, minimize loading and reduce heat Durable E-weight latex/paper backing improves performance and flexibility; reduces curling and edge chipping Proven coating technique gives more consistent and uniform scratch pattern Phenolic resin bonding agent optimizes grain adhesion and extends product life