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Are you looking to maximize the function from your new or current bong setup? Then the 9 Hole downstem from Castle Glassworks was made for you! The 9-hole design of this downstem guarantees exceptional filtration, resulting in consistently smooth and satisfying hits.
Not only does the 9 Hole downstem add filtration and diffusion to your piece, it also adds style as it has been meticulously crafted from high quality colored borosilicate glass. Elevate your experience with this premium downstem and unlock a smoking experience like no other.
Pairs well with
Specifications
- Length - 5 inches / 12.5 cm
- Joint Size - 14mm Male / 19mm Female

Downstem – 9 Hole (5 in)
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Outstanding Filtration
The 9-hole design offers outstanding filtration by breaking your smoke into tiny bubbles, giving you consistently smooth and satisfying hits. Whether you’ve been smoking for years or you’re just starting out, this downstem is crafted to take your experience to the next level. Each pull feels cooler and less harsh, helping you focus on the flavor and relaxation rather than any irritation. Get ready to enjoy a cleaner, more enjoyable session with every use.
Built For Daily Use
Crafted from tough colored borosilicate glass, this downstem is built to stand up to daily use while being easy to clean. Thanks to its 9-hole design, you’ll enjoy maximum diffusion and filtration for reliably smoother, cooler hits. The durable construction means fewer worries about chips or cracks, letting you focus on getting the most out of every session.
Product details
Universal Fit
Designed to fit all Castle Glassworks beakers, and compatible with many other beakers thanks to its 14mm male joint and 5-inch length.
Open End
Crafted with an open-end design, this downstem reduces drag, giving you smoother airflow and easier pulls.
High Quality Construction
Crafted from sturdy colored borosilicate glass, this piece is built to last, resisting chips and cracks even with regular use. Its smooth surface makes cleaning a breeze, so you can spend less time scrubbing and more time enjoying your sessions.
Eye Catching Color
This bright color brings a fun, eye-catching pop to your setup, making it as appealing to look at as it is to use. It adds a personal touch that sets your piece apart, all while still delivering top-level performance.
FAQs
Please read our FAQs page to find out more.
What is a 9-hole downstem?
It’s a special glass tube with nine small holes at the bottom. These holes create more bubbles when you inhale, resulting in extra cooling and smoother hits.
What’s the best water level for a 9-hole downstem?
Make sure the holes are fully submerged, typically about an inch above the bottom of your bong. Adjust to your preference for the best draw.
Does the 9-hole design clog easier than a standard downstem?
It’s about the same. Any downstem can clog if it isn’t cleaned often, but regular maintenance keeps it clear.
Is the 9-hole downstem good for beginners?
Absolutely. The extra diffusion is especially helpful for new smokers who may find regular hits too harsh.
Does the 9-hole design help with splash-back?
Extra diffusion can help reduce splash, but the bong’s shape and water level also play big roles.