The SMOK RPM 40 Replacement Coil is perfectly compatible with SMOK RPM 40 Pod System Kit. The SMOK RPM 40 Coil has Mesh 0.4ohm/Quartz 1.2ohm/SC 1.0ohm/Triple 0.6ohm for your selection. The different coils will meet your different needs for optimal flavor or dense cloud. 5 pieces each pack. Just get it as a spare part.