| As Glenn said, it's the counter weight. The 7336 has a larger counter weight, which is considered to give less vibration with pads 6" and larger. However you can buy the larger counter weight separately.
In either case, you'll need to buy pads. If you are new to PC-based detailing, I STRONGLY suggest that you buy the velcro backing plate with the pads as a kit. Different pads require different size backing plates. Several vendors offer them.
Regards,
Dan. |