This bundle includes a RKFR6 Roadkill Fast Rings 6" & 6.5" and a Hertz Cento Series C165L 6.5" Woofers with Extended Low-Frequency Response - Pair. The RKFR6 Roadkill Fast Rings 6" & 6.5" is a 3-piece foam ring system designed to enhance speaker performance. It reduces panel vibration, increases mid-bass response, and improves audio output efficiency. The easy peel & stick installation maximizes speaker performance. The kit includes a gasket for mounting, a middle ring, and a circular foam pad for unwanted reflections. The Hertz Cento Series C165L 6.5" Woofers feature a non-pressed paper cone for natural sound and controlled low frequencies. The high-density flux ferrite magnet and specific voice coil allow for maximum excursion and control, even in demanding musical passages. Specifications include 240W peak power, 80W continuous power, 4 ohm impedance, and a frequency response of 50Hz to 5kHz. Upgrade your car audio system with this bundle for enhanced sound quality, improved bass response, and increased audio projection into the cabin. The Fast Rings optimize speaker performance, while the Hertz Cento woofers deliver powerful and controlled low frequencies. Easy to install and designed for maximum performance, this bundle is a must-have for any car audio enthusiast. Enhance your driving experience with superior audio quality with this high-quality bundle.