Let's face it, this is one of the smallest accessories for your car that most people won't notice. This is a small detail mainly for you as the owner as you know it is unique to you. These valve stem caps are of high quality, with great attention to detail that has gone into their design and manufacture. I can't say for sure if it's real "carbon", but the insole looks nice and the American flag unobtrusively adds some patriotism. These caps also have rubber o-rings inside to further seal the valve stems. Well made and a great upgrade from the standard flimsy plastic caps.