The Yocan Evolve 2.0 Pods are designed and engineered for specific use with the Yocan Evolve 2.0. Each pack contains four of each variety, you can carry extras of either the oil pod, the e-liquid pod, or the wax concentrate pod. If you'd like you can stock on each pod variety allowing you to carry extra materials as you go. Each pod is refillable and use heating elements that are designed to enhance the vapor output of each material type. For the oil pod and the e-liquid pod, you'll find that they're both equipped with ceramic coils. Ceramic has been known for facilitating low and slow heating making it the perfect heating coil for vaporizing oils and other runny e-liquids. It delivers clean and smooth vapors with high flavor retention making for the ideal material pod for both connoisseurs and daily consumers. The wax concentrate pod, on the other hand, is outfitted with the iconic quartz dual coil (QDC) seen in most Yocan vaporizers. It provides the perfect balance of flavor and vapor density giving you the ideal experience for wax concentrate consumption Features: Refillable Magnetic Connection Material-Specific Pod Ceramic Coil - For Oils and E-Liquids Quartz Dual Coil - For Wax Convenient Easy To Use3 Included: 4 x Refillable Pods