The Driven Face assembly is constructed from several parts from which the Face Set,driven is the most expensive.
Some items from this specific schematic: Rubber,clutch Dpr, Face Set,driven, Nut,special,30mm, B/brg Rad N/com.
The most reasonably priced component used on the Cn250 Helix 1991 (m) Switzerland Kph Driven Face is the Cir Clip,7mm.