These are a 4 Pack of replacement pods for use with the Caliburn A3.
The Caliburn utilises a closed pod system meaning you change out the whole pod rather than a individual coil giving you a fresh tank every time.
With a top filling method it is easy to get topped up on the go, without the need to remove your pod but instead snapping the top off to fill.
Available in a 1.0Ω Mesh Coil these work at around 13W and provide a mouth to lung style draw.