Mirka HD61102540   6-Inch 40 Grit HD Heavy Duty Mesh Abrasive Dust Free Sanding Discs,  Box of 25 Discs 40 grit abrasive grain for fast material removal and a great finish 6 inch disc for material removal and finish sanding Screen-like composition allows dust to migrate right through the abrasive to prevent clogging Hook & loop design allows easy attachment and removal from sanders 25 discs per box