It is perfect. I have a pipe that they don’t fit but it is just that pipe. My other 6mm ground glass joints fit perfect
Great the the only issue is the joints tend to a sit little deep and so clips don’t hold them tightly. They still hold them together but they can move
One of the best I’ve had. My dad likes it too so I gave it to him and waiting to get another one once in stock.
I have a rig where you need some lungs to have a big hit and having this was almost to much air to pull. If you have a rig that has a small perp downstream it might work really well.