The Sporlan Controls 401544 "7/8"" Rotolock Drier" is a high-efficiency, rotary-type, air-drying, dust-collection system for use in warehouses, factories, and other industrial and commercial settings. The system features a 7/8"" rotary drum and a 7/8"" air intake. The drum can be rotated to direct airflow over the dust-collection area, and the system can be equipped with a dust-collection bag or filter. The 401544 is also equipped with a power switch and an on/off light.