The OXVA Velocity Replacement Pod Cartridge is best compatible with OXVA Velocity Pod Kit. The OXVA Velocity Pod has XL size juice capacity. The replaceable coil system makes it possible to install the coils. Users are capable of choosing different coils of Unicoil or Unipro Coils. 2 pieces each pack. OXVA Velocity Unicoil pod is compatible with Uni coils: RBA coil, 0.3ohm mesh coil, 0.5ohm mesh coil for DTL vaping and 1.0ohm regular coil for MTL vaping. OXVA Velocity Unipro pod is compatible with Unipro coils : 0.15 ohm mesh coil, 0.3 ohm mesh coil, and Unipro RBA.