Dayton Audio - DMPC-7.5 7.5uF 250V Polypropylene Capacitor。Arcotronics A72ZX3470ZA00J 0.47µF 850V Axial Film Capacitors for。MDL XPP Polypropylene 4.7mfd 250V。027-326_HR_0.default.jpg?。This is a Helix capacitor.I've decided to sell it as I won't be building a new audio system.I estimate it was used for about 3 months.I barely drove the car with the audio system installed.It comes with a holder, but screws are not included.Thank you for your consideration