Wima MKS4 Series Metallised Polyester Capacitors 20% – Wima MKS4F041004F00MS, A 250V 1000nF industry standard metallised Polyester (PET) capacitor. The capacitor has a high volume/capacitance ratio and is suitable for general purpose DC applications such as by-pass, blocking, coupling and decoupling, timing. Wima MKS4F041004F00MS MKS4 1uF ±20% 250V Radial Polyester Film Capacitor