Bong Glass Tree-Perc Downstem | 18mm to 14mm | Various Sizes

Introducing our tree perc downstem, featuring a 5-arm diffuser design. Crafted from high-quality borosilicate glass, this downstem ensures exceptional durability and heat resistance.

The 5-arm tree perc diffuser enhances filtration, with each arm featuring 3 precision-cut slits to break down smoke into smaller bubbles, providing smoother, cooler hits and an improved smoking experience.

The glass downstem is 18mm to 14mm, meaning it fits into a bong or water pipe with an 18mm (or 19mm) female joint, while the inside part holds a 14mm (or 14.5mm) male herb bowl.

If you’re unsure about the gender or size of your joint and herb bowl, or don’t know the length of downstem you need, please check out our article—”How to Figure Out the Size of Your Downstem” It gives a simple, step-by-step guide to help you avoid buying the wrong one.