M's Line homepage。M's Line homepage。MDL XPP Polypropylene 1.0mfd 400V | Madisound。Jantzen Audio 1.5uF 800V Superior Z-Cap Crossover Capacitor。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