Commercial upright vacuum features: Cog V-belt with Cog motor and brush pulley. RPM circuit breaker shuts Off motor when brush roller RPMs slow down. 12" wide cleaning head covers a wider area and leaves no center dirt path. Clear, nonmarring bumpers. Exclusive MicroSweep goes from carpet to bare floors with no adjustments. Cord guard prevents cord damage. Soft wheels protect wood floors. Convenient power switch in handle. Ingenious top-fill design keeps power at maximum even while bag fills. Powerful, high-speed, balanced, double helix brushes whirl at 6500 RPM, almost twice as fast as other brands. 1 year commercial warranty. 5 year warranty on belt. 8 lb. Refer to Model No. PK8000-9 (SKU 610397) for replacement bag.