Bong Glass Hole Diffuser Downstem | 18mm to 18mm | Various Sizes

High-quality clear glass replacement bong downstems available in various length.The length measurements are shown in the image below.

Each downstem joint size is 18mm to 18mm. Ideal for glass bongs with an 18mm female joint size, it fits a 18mm male bowl on the interior side, making it a versatile addition to various setups.

Crafted from premium borosilicate glass, it features precision-cut holes for enhanced filtration, breaking up smoke into smaller bubbles for smoother, cooler hits every time.

If you’re unsure about the gender or size of your joint and herb bowl, or need help choosing the right downstem length, check out our article, “How to Choose the Right Downstem Size.” This step-by-step guide makes it easy to find the perfect fit and avoid any buying mistakes.