The SMOK RPM 4 Pod is a collection of clear PCTG cartridges used to maintain the SMOK RPM 4 Kit. There are two types of pods: one for the RPM 4 RPM Pod, which uses the RPM coil, and one for the RPM 4 LP2 Pod, which uses the new LP2 coil with a leak-proof construction. Both pods feature a 2ml capacity, which is enough to deliver a continuous atomization experience while avoiding the need to refill e-juice on a regular basis.