Here's the dilemma- you really like a certain pipe, but it takes a European-style 9mm filter, and you don't like filtered pipes. Your only options are to buy it and use the filters, buy it and smoke it without the filters (which may result in a wet smoke), or not buy the pipe, as much as you like it. You now have another, affordable option. With this 9mm to 3mm adapter, the problem is solved. Just slip this piece in place of the filter, and it will smoke as if it's a non-filtered pipe, and they're inexpensive enough to by one for every 9mm pipe you own. That's a heckuva lot cheaper than having a non-filtered stem made!
Placed it in the pipe i got in the introductory sampler a few weeks back. It does not seem to affect the draw to me. Should work well in my pipe and save me from having to buy filters all the time.
It was a perfect fit in my Peter Heinreich's 9mm, billiard and I bought this so I would not have to carry around pipe filters. I was very excited to get this insert, until I had the opportunity to use it for the first time. It restricted the airway so much it was like trying to draw off of a solid piece of lucite. This is a big disappointment and would probably work great if it were just a hollow piece of vulcanite without the metal stinger with one hole...
Hard to find pipe with stem of bowl to use this with