4.16.10.03.64 3μF Polypropylene Capacitor PP 450V ac ±5%. Ducati 4.16.10/15 series are snap-in (quick connect) Polypropylene film capacitors. They are an electric motor capacitor used to start and run. The case and cover feature a self-extinguishing plastic material, the capacitive element is sealed with polyurethane resin.