The Uwell Valyrian 3 replacement coils are specifically made for the Uwell Valyrian 3 vape kit and sub ohm tank. These coils are designed for DTL (Direct to Lung) vaping, resulting in a higher volume of vapor production. With various resistances available, you can try out different options until you find the perfect vape experience. It is recommended to use a 70% VG e-liquid or higher for optimal results.