Clear Glass r Worked Mid SectionClear Glass Bubbler with coloured mid section Made from crystal clear borosilicate glass with a worked mid section this piece has a taller more sculpted neck but still comes in at approximately 7 tall so a perfect dimension for holding in the hand. The clear glass can allows you to see your bubbling action, and also when to clean the pipe! 420Glass Bubblers offer some of the best value on the market at the moment and are exclusive to everyonedoesit.