Savinelli's balsa filters provide a drier smoke by the simplest of means: absorbing moisture and condensation, along with impurities, from the smoke-stream. While many more complicated systems have come and gone, Savinelli's remains, and remains popular, being both effective and very inexpensive. These larger, 9mm filters will fit both those limited series of Savinellis which use the wider diameter, as well as various brands of pipes originally designed to use 9mm charcoal filters. Choice of 15-Count and 50-Count, when in stock.