Fordite or Detroit Aggregate as some know it, is made from hundreds of layers of paint. Layers and Layers of paint build up as the assembly line rolls through the paint booth. This material is from the Jeep Assembly line in Toledo Ohio. The year range of the material will be noted in the description. The colors you will see in these pens is in the 18-21 model years of Wranglers and Gladiators. Colors Like Bikini Pearcoat, Mojito, Punk’n, Snazzberry, Ocean Blue, Nacho, Sting Grey, and others. Most people have never heard of or seen of this material. These are sure to the be the highlight of any jeep lovers collection.