The Yocan Rex Coils are the exclusive replacement coils made specifically for the Yocan Rex Portable Enail Vaporizer Kit. These coils are made using the Yocan Quartz Tri Coil (QTC) technology which puts three quartz rods together and wrap them in high quality metal coils. The result is fast heating of your select wax concentrates which allows superior vaporization of your favorite extracts. The Yocan Rex Coils are made to bridge the gap between the brand’s iconic Quartz Dual Coils (QDC) and their Quad Coils. As a result, consumers and owners get the best of both worlds, and by that we mean good vapor production and just the right flavor retention.