With a quantity of four pieces, the Pin,roller Guide is the most used part in the DRIVEN FACE diagram.
Some items from this specific schematic: Face Set,movable, Pin,roller Guide, Roller,guide, Weight Set,clutch (mca).
The most reasonably priced component used on the Cn250 Helix 1988 (j) Italy Kph Driven Face is the Cir Clip,7mm.