This is a complete set of H7 6000K White Xenon HID Kit for your Low Beam Headlights. This kit includes 2 x H7 6000K HID Bulbs, 2 x Advanced A/C Digital Slim HID Ballasts. This kit produces 6000K White light for a brighter light output.Our Slim HID Ballasts are much smaller than regular sized ballasts which gives you a lot more choice for mounting locations and easy installation. Unlike those low cost DC ballasts, they are A/C digital which produce stable lights due to better current control, thus leads to more reliable performance and longer product life.This kit ONLY fits ONE of these three lights, Fog OR Low beam OR High beam of the vehicle. Please find out the application for your car from the Sylvania Automotive Replacement Guide before purchase. Please also feel free to contact us for fitment questions.