The Nord 4 Empty Replacement Pod by SMOK is a 4.5mL refillable pod that is designed to be compatible with multiple coil ranges. The Nord 4 RPM 2 Pod is suitable for the RPM 2 range of coils. The Nord 4 RPM Pod is suitable with all RPM coils. The implemented press-fit coil installation method allows for a simple process when replacing coils. These replacement pods feature a duckbill mouthpiece that feels comfortable and satisfying each time you vape.