The inner tube is a glass CCFL technology (Cold Cathode Fluorescent Tubing) similar to a florescent light that you will use in your home but on a smaller scale. One year manufacturer limited Warranty. This warranty covers if the CCFL halo rings or if the transformer stop working for any reason. The warranty does not cover this kit if you accidentally break the glass of the ring. This installation requires you to heat and open the headlight lamps in order to install this product. You can either use a oven or heat gun to open headlight lamp. This product requires a silicone adhesive type application, therefore there is no return or exchange once it is installed This sale is for CCFL halo lights rings only, and the necessary hardware to installed it. This sale is Not for the whole headlight a