The Aluminum Bowl Spacer is designed to work with the Fumo bowl system. It is not designed to fit the Fumo standard bowl. Its function is to fill the bottom space in the bowl when less tobacco is desired. It effectively reduces the total bowl volume by about 50% so that the large bowl can now also be a small bowl when there is no need for a longer smoke. It compliments and works in conjunction with the WG2 heat system to fully compliment a custom smoking experience.