The Dual Wheel - Active Gate Rotator is designed by Optikinetics fits both Standard 6" Wheels and 9" Max Wheels giving you the ability to interchange them depending on the image size desired.
It also has variable speed control, from 1 revolution in 30 minutes up to 5 revolutions in 1 minute.
This version has the "Active Gate" which means that it no longer requires the Din plug on the side of the projector.