It's literally impossible to find a replacement pod for your Boulder Rock Starter Kit that's better than the Boulder Rock Replacement Cartridge: they're actually made for each other! These awesome pods are both replacement coil and replacement tank, 'cause that's how replacement cartridges work, after all! They're the same great quality as the original carts that came with your Boulder Rock vape pen, because they are. At these prices, pick up a few!
Prices above are for single coil, not a two pack.