Ash Catchers are made to get dirty and keep your tube clean. The octopus percolated ash catcher also adds a unique diffusion to your hit. 19mm Ground joint and takes a 19mm bowl. Ash Catchers are made to get dirty and keep your tube clean. The octopus percolated ash catcher also adds a unique diffusion to your hit. 19mm Ground joint and takes a 19mm bowl. Features: 90 Degree Angle, 19mm, High Quality Glass