VOOPOO Drag X Cartridge (Drag S Cartridge) is specially designed for VOOPOO Drag X/Drag S Kit, which is made of PCTG and can store a whopping 4.5mL of vape juice for fewer refills which are easy anyway thanks to an effortless bottom fill juice port. Drag X/S pods can be adapted to a wide range of coils, including RBA. VOOPOO Drag X/Drag S PnP Pod is compatible with all PnP coils. VOOPOO has created a new concept product VOOPOO PNP Tank(Sold separately), which is composed of Drag X Pod / Drag S Pod + bottom 510 base with airflow adjustable, can flexibly switch between POD and TANK. Just experience the fun of pods and buy this replacement pod.