Dayton Audio DMPC-7.5 7.5uF 250V Polypropylene Capacitor。Recap Kit for Kenwood KL-777 Speaker Crossovers MPT Film。Buy Duelund Capacitor 2.7uF 250Vdc CAST PP Series Metalized。DS18 BB4.7UF/100V-10PK 4.7uF 100V Non-Polarized Bass Blocking Capacito。。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