3M 30367  PURPLE FILM FINISHING DISCS 75MM 260L  PK50 P1500Model No. 303673M P1500 75mm Purple Hookit Film Disc, Plain, 260LPK50They give a fast cut combined with a long disc life.These film discs are used for scuffing the blend area before painting and also for removing dust nibs and excessive orange peel from topcoats.