4 Inch 400 Grit (A35-Green) Velcro Backed 3M 268XA Trizact Disk

3M's 268XA Trizact material is an embedded aluminum oxide structure with small pyramid shapes on the surface of this disk that allows for quick, high removal of material, but with a super fine finish of aluminum oxide on the glass surface. The Trizact disks are an excellent choice for pre-polish finishing of your glass surfaces before moving to a final polish with cerium oxide.

The softer aluminum oxide abrasive is perfect for cleanup on surfaces to give a semi-transparent finish on the glass that is super easy to polish.

Be aware that Trizact disks will generate a lot of surface heat while working your glass,so be careful not to overdo it or you'll end up with micro-fractures in your glass surfaces.