Hey guys, I bought a bong not too long ago and I've been wanting to buy different glass slides for it. I'm having trouble finding out the size of the slide since I wasn't told whether or not it was a 14mm or 18mm when I had purchased it. I'm not sure if you can tell from looking at it but here's an image of the bowl I have now. Any help is appreciated, thanks.
Put a penny next to it and take another pic... It MAY be 18mm but another pic will let us tell you for sure. CHeers.
I would measure it but unfortunately I don't have any measuring tape to measure it with. Here's a picture with a penny next to it, sorry about the crappy phone pictures.