18mm to 14mm Pipe/Bong adapter

thingiverse

I whipped this up out of necessity, but it's not quite perfect yet - it does the job for now, though. I'm planning on giving it a bit of a makeover soon. It was designed specifically to accommodate 14mm bowls with 18mm pipes. Additionally, I had a collection of vaporizer tools and connectors that needed connecting, and I'd misplaced my glass adapter. The rim is intentionally designed for easy removal.