VGIII
The VGIII brushroll is actually for the Eureka PN's of the 90s. The VGII actually works better for carpeting since it helps to beat the dirt out of the pile. I have an aftermarket "4-brush VGII" which is actually a generic, and it just doesn't get as much dirt as the original VGII does. It brushes faster, and it's quicker on pet hair, but if you're going slowly enough with the vacuum anyway, the 2 brushes spin plenty fast to get the job done quite handily.