4 Inch Glass Diffused Downstem | 18mm to 14mm

This replacement downstem is 4 inches (102mm) long, making it a great fit for bongs that are 9 to 10 inches tall.

It’s made from high-quality borosilicate glass and has a 6-slit design at the bottom, which helps smooth out your hits.

The size of this downstem is 18mm to 14mm, meaning it fits into a bong with an 18mm (or 19mm) female joint, and the inside can hold 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.