Most puck type clutches that use 6 pucks in ceramic or Cidered Iron normally weight about the same as a stock organic material full face disc. Feramic material is graphite impregnated cidered iron....... The more grafite added to the cidered iron the smoother the clutch will act, But the heavier it becomes. I have been told that most Feramic 4 pucks weigh about the same as a cindered iron 6 puck of the same size. If you make a full face disc out of feramic it will be extremely heavy.