The Yocan Evolve-D Vaporizer Replacement Coils are a pack of five dual spiral pancake coils, implementing a 1.0ohm resistance, twin spiral pancake coils, and are geared to rapidly and evenly heat any loaded material in the atomizer chamber. There are two types of coil fit for the Yocan Evolve Kit: the Yocan Evolve Ceramic Donut Coil, which is an innovative ceramic coil with a resistance of 0.8ohms, and the Yocan Evolve Dual Quartz Coil, which boasts strong and durable 510 threaded connections. The Yocan Evolve Coils and Yocan Pandon Coils are also available as replacement coils.