The SANDING BELTS are made by VSM Abrasives Corporation with dimensions of 4" x 36" and have an 80 grit rating.
"Compact Grain" belts, such as the 600 grit version, use a special layering of grit in adhesive for increased belt life, despite their rough appearance.
These aluminum oxide sanding belts are resin bonded, enhancing their durability, and are sold individually.