The company offers oversized filter bags, designed to help any small dust collector perform at the level of a much larger unit. According to the company, collectors ranging from 0.5 hp to 1 hp (400 cfm to 1,000 cfm) can be made more efficient with the addition of a larger, scrim-supported felt bag, which offers air relief while still capturing dust particles as fine as 1 micron. Also, the scrim reportedly provides added strength for greater durability and extended bag life. (800)-367-3591, AmericanFabricFilter.com.