2008 Mazda Mazda3 Hatchback Mark II Shark Fin Antenna (Custom Painted: Velocity Red Mica 27A) 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 Easy Installation Antenna Type: Mark II