Tree Glass | 15" Dual Tree-Perc Glass BongTree Glass 15" Dual Tree Percolator Bong Twice the trees. Twice the power. This Straight Tube Tree Glass Dual Tree Percolator Glass Bong is a massive flex. A beautiful piece built for seriously smooth hits like never before. Standing tall at 15 inches, this clear cut beast runs your smoke through two stacked tree percolators, blitzing it into silky, icy perfection before it even touches your lips. Experience hits so clean and cool, theyll have you