DS18 BB4.7UF/100V-10PK 4.7uF 100V Non-Polarized Bass Blocking Capacitor DS18’s high quality bass blocking capacitors will help your system reproduce brighter and clearer highs on installation! Highlights 4.7 microfarad value 5% dissipation factor and 100 VDC Working Voltage Pack of 10 Great For Pro Audio Car Audio