3M Cubitron II Film Disc 775L, 127 mm, 220+, 500LG 500LG, 50 per inner, 250 per caseCubitron II clean sanding disc, feature triangular shaped ceramic mineral. As the triangular shaped grain wears, it continually fractures to form sharp points that slice through the substrate, wear evenly and provide extra long life and consistency. Features and Benefits Ideal for a variety of applications focused primarily on stock removal Hook and loop attachment for fast and easy disc changes Multi hole pattern removes dust at a higher rate than 5