5.75" Diffused Downstem, 8-Slit Borosilicate Glass Upgrade
Specifications
5.75" Diffused Downstem, 8-Slit Borosilicate Glass - Product Specifications
Length: 5.75 inches / 14.5 cm
- Universal length for Castle Glassworks beaker bongs and similar sized bongs
- Properly sized to reach the water in the beaker base without being too long
- Low-cut perc sits perfectly in your bong's base for ideal water immersion
- Important measurement if you need a replacement - measure your current downstem first
- Proportional length ensures optimal bubble action and filtration
Joint Size: 14mm Female / 19mm Male
- 19mm Male end inserts into your bong's female joint
- 14mm Female end receives your bowl
- Universal sizing makes it compatible with most standard setups
- Male end goes in, female end goes around - remember it this way
Diffusion: 8-Slit Design
- Eight precision-cut slits at the bottom of the downstem
- Each slit breaks smoke into multiple smaller bubbles
- More slits = more surface area = better filtration
- Maximizes air-to-water contact to filter out heat and harshness
- Creates cooler, smoother hits that are gentler on throat and lungs
Material: Colored Borosilicate Glass
- Premium borosilicate glass known for strength and heat resistance
- Available in multiple vibrant colors (purple, green, blue, pink, grey, etc.)
Joint Collar: Thickened & Reinforced
- Extra-thick glass at the joint connection point
- Adds durability where it matters most (common breakage area)
- Prevents cracking at the stress point where downstem meets bong
Logo: Heat-Bonded Castle Branding
- Castle Glassworks logo is heat-bonded to the glass
- Won't fade, peel, or wear off with regular use and cleaning
Percolator Design: Low-Cut Placement
- Slits positioned low on the downstem for proper water immersion
- Better smoke-to-water contact than high-positioned percs
Water Level Guidelines:
- Ensure all eight slits are fully submerged in water
- Aim for about 1 inch of water above the slits
- Avoid overfilling - too much water causes splash-back
- Too little water means some slits won't diffuse properly
- Proper water level is key to optimal performance
Compatibility:
- Universal Fit: Compatible with all Castle Glassworks beakers and accessories
- Compatible with carbon filters and ash catchers (check joint sizes)
Cleaning & Maintenance:
- Soak in glass cleaning solution
- Use pipe cleaners to clean out the eight slits
- Rinse thoroughly with warm water
- Regular cleaning prevents buildup in slits
Why These Specs Matter: This isn't just any downstem - it's a serious filtration upgrade. If you're still using an open-ended downstem, this upgrade will transform your smoking experience, you'll immediately notice the difference in smoothness and coolness!
What's in the box?
What's in the Box
Your 5.75" 8-Slit Downstem:
A replacement downstem made from colored borosilicate glass with a heat-bonded Castle Glassworks logo.
Bottom Line:
Everything you need to transform your bong's performance immediately. Simply insert the 19mm male end into your bong's joint, ensure the slits are fully submerged (about 1 inch above the slits), and experience consistently smooth, flavorful sessions.
5.75" Diffused Downstem, 8-Slit Borosilicate Glass Upgrade
Take Your Bong Setup to the Next Level with This High-performance Downstem
It’s easy to install, built to last, and delivers consistently smooth hits. Grab yours now and feel the difference with every inhale.
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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increased filtration
The 8-slit design maximizes filtration by breaking smoke into smaller bubbles, creating cooler, smoother hits that are gentler on your throat and lungs. This downstem delivers a consistently enjoyable smoking session every time. Thanks to its extra filtration and open-end design, the 8-slit downstem offers smooth hits without sacrificing airflow.
Free shipping and returns
Designed with everyone in mind
Whether you’re a long-time smoker or just getting started, the 8-Slit Downstem from Castle Glassworks is made to elevate your smoking experience. Crafted for smooth hits and consistent performance, this essential accessory uses eight slits to cool and filter your smoke. Don’t miss out on the perfect upgrade for your glass collection—try the 8-Slit Downstem today and feel the difference.
Product details
Universal Fit
Our downstems are compatible with all Castle Glassworks beakers, making it easy to mix and match your favorite Castle accessories without worry.
Durable Logo
Never worry about your logo fading again. Our heat-bonded vinyl process ensures that the logo on your downstem remains intact, even with regular use and cleaning.
Colored Borosilicate Glass
Our downstems are carefully crafted from colored borosilicate glass, which is known for its strength and heat resistance. This means you can enjoy sessions without stressing about cracks while cleaning. Plus, the vibrant colors give your piece a fresh, stylish look that stands out.
FAQs
Please read our FAQs page to find out more.
Why does the downstem have eight slits?
More slits allow more air and water to interact with the smoke, breaking it into smaller bubbles for a cooler, smoother inhalation.
Is there a specific water level I should maintain with an 8-slit downstem?
Make sure the slits are fully submerged, but avoid overfilling. One inch above the slits is a good starting point.
Can I use a carbon filter or ash catcher with it?
Yes. Just ensure your setup’s joint sizes align, and enjoy even cleaner hits.
Is it worth the investment if I already have a regular downstem?
Many find the smoother, cooler hits worth upgrading. It’s a small accessory that can make a big difference.
Does the 8-slit downstem change how I pack my bowl?
You can pack your bowl the same way you would with a standard downstem. The design only affects how the smoke is diffused.