The Dual MeshLine to TriTower perc bongs by 2K Glass Art are produced in sunny southern California. Each piece is handmade with precision for the best smoke diffusion possible. The gridded Dual Mini MeshLine perc to gridded TriTower perc will stack bubbles on bubbles! Along with the 4-hole screen slide you are guaranteed to get a big hit! Just open the box and get started, as this piece comes complete and ready to use.