2010-2017 Ford Focus Sedan Mark II Shark Fin Antenna (Ruby Red Metallic RR) This sharkfin accommodates "Larger Sized Antenna Bases that incorporate OnStar, XM/Sirius, Cellular, or GPS antennas. Antenna bases that incorporate OnStar, XM/Sirius, Cellular, or GPS antennas into their designs are significantly larger in size. If you have one of these options, this Shark Fin is designed specifically for this. Custom painted to match your color and color code. Color Code is listed on the product title above. Easy Installation Antenna Type: Mark II