Smoking pipes
by Black Leaf
A fritted glass screen is a reusable bong filter made by fusing small borosilicate glass fragments into a single porous disc. Instead of fiddling with flimsy metal gauzes that clog, warp, and taint your flavour, you drop one of these into your bowl and forget about it. Smoke passes through the fused pores freely; ash and debris stay put. That's the whole idea — and it works brilliantly.
Fritted glass screens come in three diameters to match standard glass joint sizes. Measure the inner diameter of your bowl or downstem before ordering — a screen that's too large won't sit flat, and one that's too small will drop straight through.
| Variant | Diameter | Quantity | SKU |
|---|---|---|---|
| Small | 12.5 mm | 4 pieces | HS0776 |
| Medium | 15 mm | 3 pieces | HS0773 |
| Large | 18 mm | 3 pieces | HS0774 |
Most standard bongs use 14.5 mm or 18.8 mm joints. The 15 mm screen fits snugly inside a 14.5 mm joint bowl, and the 18 mm screen suits an 18.8 mm joint. The 12.5 mm version works for smaller hand pipes and chillums. When in doubt, grab a ruler — 30 seconds of measuring saves you a return.
If you've been smoking through a bong for any length of time, you've probably dealt with the annoyance of brass or stainless-steel gauze screens. They work — initially. Then they clog with resin, warp from heat, and eventually start to taste like you're licking a coin. We've had customers bring in metal screens that looked like tiny crumpled crisp packets after a week of use. Not ideal.
The fritted glass screen sidesteps all of that. Because it's made from reinforced borosilicate glass — the same material as your bong itself — it handles repeated heating and cooling without deforming. Borosilicate glass has a thermal expansion coefficient of roughly 3.3 × 10⁻⁶/K, which in plain English means it barely moves when it gets hot. No warping, no cracking under normal use. The fused-pore structure gives you consistent airflow every session, and because glass is non-reactive, it adds zero flavour to your smoke. What you taste is what you packed.
The honest limitation: glass screens are slightly more fragile than metal ones if you drop them on a hard floor. They're tough in the bowl — heat and resin won't faze them — but a tile floor will. Keep a spare or two in the drawer. That's exactly why Black Leaf packs them in sets of 3 or 4.
The word "fritted" sounds technical, but the process is straightforward. Small fragments of borosilicate glass are placed into a mould and heated until they partially melt and bond together at their contact points. The result is a solid disc riddled with tiny interconnected pores — think of it like a glass sponge. These pores are large enough to let smoke through with minimal drag, but too small for ash or herb particles to pass. The disc is then annealed (slowly cooled) to relieve internal stress, which is what gives it that surprising durability.
Pick one up and you'll notice it has a slightly rough, granular texture on both faces — that's the frit structure you can feel with your fingertip. It's noticeably heavier than a metal screen of the same diameter, which actually helps it sit securely in the bowl without shifting around when you draw.
| Specification | Detail |
|---|---|
| Brand | Black Leaf |
| Material | Reinforced borosilicate glass |
| Available diameters | 12.5 mm, 15 mm, 18 mm |
| Pack sizes | 4 pcs (12.5 mm) / 3 pcs (15 mm, 18 mm) |
| Reusable | Yes — clean and reuse indefinitely |
| Dishwasher safe | No — use isopropyl alcohol soak |
| Heat resistance | Borosilicate rated to approx. 500 °C |
| Colour | Clear / translucent |
Complete your setup: pair these fritted glass screens with a Black Leaf bong or a glass downstem for a fully glass-on-glass smoking experience. If your bong water gets grimy fast, a bottle of bong cleaner will keep everything spotless between sessions.
Smoking without a screen means ash, half-burnt herb, and fine particles get sucked straight into your bong water — or worse, into your mouth. That gritty, ashy hit at the end of a bowl? That's what happens when there's nothing between your herb and the downstem hole. Over time, those particles clog your downstem and percolator, making your bong harder to draw through and a nightmare to clean.
A fritted glass screen catches all of that at the source. Your bong water stays cleaner for longer, your hits taste better from first to last, and you spend less time scrubbing resin out of tight spaces. We'd call the fritted glass screen the best bong screen option for anyone who uses glass-on-glass setups — it matches the material, it's reusable, and it doesn't corrode. For the price of a coffee, you're sorting out a problem that affects every single session.
One thing worth knowing: if you pack your bowl very tightly, airflow through any screen will drop. The fritted disc works best with a medium-ground, loosely packed bowl. Give it room to breathe and it'll reward you with smooth, even draws.
No. The fused pore structure is designed for free airflow. Draw resistance is comparable to smoking without a screen — you just don't get ash in your water anymore. If airflow drops, it's time for a soak in isopropyl alcohol.
With proper cleaning, indefinitely. Borosilicate glass doesn't degrade from heat or resin. The only thing that kills them is dropping them on a hard surface. Handle with basic care and one screen can last years.
You can, as long as the bowl diameter matches one of the three available sizes (12.5 mm, 15 mm, or 18 mm). They work in any pipe where the screen can sit flat over the hole. Glass-on-glass bongs are the natural fit, but they're not exclusive to them.
Soak it in 90%+ isopropyl alcohol for 30–60 minutes. For stubborn buildup, add coarse salt to the soak and give it a gentle shake in a sealed bag. Rinse thoroughly with warm water and air dry. Avoid the dishwasher — the small disc can slip through racks and shatter.
A daisy screen is a single piece of glass shaped like a flower with open gaps between the petals. A fritted screen is a solid disc with hundreds of tiny fused pores. The fritted design catches finer particles and provides more even airflow, though daisy screens are slightly easier to remove from the bowl.
They fit any bowl with a matching inner diameter. Measure before buying. The 15 mm screen is the most common fit for 14.5 mm joint bongs, and the 18 mm suits 18.8 mm joints. If your bowl has an unusually shaped or tapered hole, a flat disc screen may not sit flush.
For glass bongs, yes — we'd pick them every time. They don't corrode, don't add metallic taste, and last far longer. Metal screens still have their place in travel pipes where you might drop things regularly, but for a home bong setup, fritted glass is the upgrade worth making.
Last updated: April 2026
