18mm to 14mm Diffused 5-Arm Tree Perc Downstem
A five-arm tree downstem — the cheapest real upgrade you can make to a plain bong.
Swapping a plain slitted downstem for a five-arm tree is the single biggest improvement most bongs can take, and it costs a fraction of a new piece. Five arms diffuse separately instead of one column of slits doing all the work.
- 5-arm tree diffusion: A genuine filtration upgrade, not a like-for-like swap.
- 18mm to 14mm: 18mm into the joint, 14mm bowl on top.
- Nine lengths, 2" to 6": Measure your joint to base before ordering.
Ships fast in plain, unmarked packaging.





































