It wasn't to be taken to serious. Was just a bordum experiment mainly. But I do dislike charcoal filters. I dont like the draw and when I pack looser I don't like the burn. But I do smoke a bit hot at times and thought maybe the wood would absorb so I tried it. It was a fail because ot didn't absorb anything it didn't clog the airway though. But someone told me a toothpick is what he uses and it worked. Toothpicks arent the same wood I guess. Most of my pipes can take a filter some 9 some 6. I may try sticking a 6 in a 9 pipe. Not sure about what to do for a 6 pipe though. I haven't tried the toothpick yet.