Specially designed for SMOK Fetch Pro kit, the SMOK Fetch Pro Pod Cartridge comes with empty RPM pod and empty RGC pod with 2ml/4ml/4.3ml e-liquid capacity for your different requirements. The empty RPM pod is compatible with the SMOK RPM 40 Replacement Coil while the empty RGC pod fits for SMOK RPM80 RGC Coil. Three pieces for each same cartridge. Just get it for your Fetch Pro kit!