Okay everyone I need some help. my bong broke ( dont ask how) and I found a handpipe attachment that would be soooo useful. they have 2 sizes. 18mm and 14mm. how do I measure my bowl to know what one to get?
Take your original slide and trace joint circle onto a notecard and take that notecard to the shop and see if the 18mm or 14mm matches it.
If your pinkie fits in the hole then you probably have an 18mm. Sorry if that isn't very helpful but I can just see the difference now and it has been a long time since I had to actually check.