Boro tank for Billet Box Rev4.
Stock - original Billet Box boro tank.
Mums - Mums Fantasy Factory transparent boro tank. Comes with black gasket and glass [pic shows incorrect red gasket]. Has builtin dryplug at the bottom.
Material integrity may become compromised with use of select liquids; (Citrus, Menthol, Mint, Cinnamon). Except the one made with Titan material.