This Black Leaf® lung cools smoke via a soft percolator. In this way inhaled smoking is softer and more delicate for the lungs. The lung with a 45° angle adapts to a bong with a standard 14,5 mm attachment. The brazier attack is 18.8 mm. Thanks to the adapter, the lung can be used optionally for standard 18.8 mm or 14.5 mm bong braziers.