Marble Ball 4mm

Marble Ball 4mm

4mm glass marble ball for bong downstems, pipes, and dab rigs. Creates finer bubble diffusion when placed in your stem, resulting in smoother, cooler hits. Made from heat-resistant borosilicate glass that won’t crack under temperature changes.

Sizing Guide

4mm is the most versatile size, fitting most standard downstems. For narrow stems try 3mm, for wide stems go with 5mm or 6mm.