FlexFit basket design;OEM adapter plate included;PEI dome tweeter;6-by-9-inch full-range speaker with 150 watts maximum power handling (75 watts RMS);Mineral-filled and polypropylene injection molded cone with butyl rubber surround;PEI dome tweeter with built-in crossover;Flex Fit basket allows slight adjustment of the speaker when mounted;60Hz - 24kHz frequency response with 91dB sensitivity