3M 81399 Sanding Belt, 3 in W, 21 in L, P50 Grit, Coarse, Ceramic Aluminum Oxide Abrasive

Tough, durable Cubitron-based Regalite abrasive on Y-weight cloth backing. Self-sharpening Cubitron sol gel mineral creates sharp new cutting edges as it wears for high cut rates, long life, consistency, increased productivity and fracture toughness. Higher stock removal with less heat and loading.