The Smok RPM Replacement Pod Pack is designed for the Smok RPM 40 Kit and come in two types: one designed for Smok Nord Coils and the other is designed for RPM Coils. These pods allow users to customize their devices with their preferred coil preference. In turn each pod has a 4.5ml liquid capacity for the Nord Pod and a 4.3ml capacity for the RPM Standard Pod. Both variations feature a refillable port, plugged by a single silicone piece. This makes refilling a simple task.