SMOK Nord Pro Empty Replacement Pods are empty cartridges that can hold 3.3mL of e-liquid with side fill design and are built with two different sized air inlets. It utilizes the NORD PRO Mesh coil series.

SMOK Nord Pro device 

3/pkg

Pod Design: Refillable Pod System/Replacement Cartridge (Coils Sold Seperately)
Coil Resistance: 0.6Ω-3.0Ω
Filling Mechanism: Side-Fill | Silicone-Stoppered
Pod Capacity: 3.3ml
Pod Connection: Magnetized Gold-Plated Connection
Features: Min. Fill Line, Coil Locking System