Mallory constructed these distributor rotors from an innovative, space age plastic that combines the high dielectric strength required for today's high energy ignition systems and high impact-resistant qualities to prevent damage. Plus, they use corrosion-resistant brass inserts and to provide an unrestricted energy flow.

Fits both 4&8 cylinder magnetos for the following models:
- Sprint Mag II
- Super Mag II, Super Mag III, Super Mag IV, Super Mag V