The Argus Pod Empty Replacement Pod Cartridge by VooPoo features a 4-hole Air Inlet, 2ml Pod, and a Side fill System with a Silicone stoppered. Can be used with VooPoo PnP coil, we recomend the PNP-TR1 1.2ohm or the PnP-TM2 0.8ohm for a suitable vaping experience. Additionally, it comes in a pack of two and is endowed with a magnetic connection that enables simple installation.