Black Leaf Carball Acticated Carbon AdapterThe 'Carball' from Black Leaf is an activated carbon adapter for bongs for filtering the smoke. The adapter is filled with activated carbon and then placed between chillum and bowl. The activated carbon filters most of the harmful condensates and tar from the smoke without affecting the effect. The smoke tastes much milder and the lungs are spared. In addition, the bong stays clean longer. Stainless steel screen included. With pattern in various neon