Books about Golden Bear 510mm cartridges

GOLDEN BEAR EXTRACT: Full Spectrum Oil Tops – 1 Gram
These tops are made from full spectrum oil, 1 full gram per top.
**Did you know ?
-Not all tops are made in the exact same size. Our suppliers help us keep pricing down by working with slightly larger tops that can hold a little over a gram. The extra space is needed in order to create a tighter airlock so that the tops do not leak. Although it may not be the most aesthetically pleasing, it does ensure there is NO leakage.