3mm glass marble ball for bong stems and pipes. Improves airflow and smoke diffusion.
Marble Ball 3mm
3mm glass marble ball designed for use in bong downstems, pipes, and dab rigs. Drop one or more into your stem to break up the smoke into smaller bubbles, increasing water contact and cooling the hit. Heat-resistant borosilicate glass.
Sizing Guide
3mm balls work best in narrow downstems and smaller rigs. For wider stems, consider the 4mm, 5mm, or 6mm options. Mix sizes for maximum diffusion.