The original Dr. Perl's, these 9mm activated charcoal filters helped make the Vauen name what it is today. For use in your own Vauen, or most any other 9mm filter pipe, Dr. Perl's filter's ensure a purer, milder smoke.
I did a filter shootout between these and another popular filter. These were the clear winner. These filters do not restrict the draw like others do. I did not notice a discernible change in flavor. Most surprising was the noticeable drying out o... Read Moref a wet smoke, as aromatics can produce. If you want a nice cool, dryer smoke, I recommend Vauen. Read Less