Dab rigs & tools
by Qnubu
The Qnubu Rosin Press Bag is a food-grade nylon mesh bag designed for solventless cannabis extraction using heat and pressure. Pack your material in, press it flat, and collect pure rosin on the other side — no butane, no CO2, no lab equipment. Just clean oil squeezed straight through the mesh. Available in five micron sizes (25μm, 37μm, 90μm, 120μm, 160μm), each pack contains 10 bags measuring 11 x 5cm.
The micron rating tells you how fine the mesh is — lower numbers mean smaller holes and purer output, but slightly less yield. Higher numbers let more plant material through, giving you bigger returns with a touch more plant matter in the final product. Here's the breakdown:
| Micron Size | Best For | Yield vs Purity |
|---|---|---|
| 25μm | Bubble hash, dry sift — ultra-clean rosin | Lowest yield, highest purity |
| 37μm | Bubble hash, kief — very clean output | Low yield, very high purity |
| 90μm | Flower rosin — the all-rounder | Balanced yield and purity |
| 120μm | Flower rosin — slightly more generous | Higher yield, good purity |
| 160μm | Dry, cured flower — maximum extraction | Highest yield, more plant material |
If you're pressing flower for the first time, start with 90μm. It's the sweet spot most home pressers land on — enough filtration to keep the rosin clean, enough flow to get a decent return. If you're working with bubble hash or kief, drop down to 25μm or 37μm for that glass-like clarity.
| Specification | Detail |
|---|---|
| Brand | Qnubu |
| Material | Food-grade nylon mesh |
| Bag dimensions | 11 x 5cm |
| Available micron sizes | 25μm, 37μm, 90μm, 120μm, 160μm |
| Pack quantity | 10 bags |
| Extraction method | Heat and pressure (rosin technique) |
| Solvents required | None |
Complete your rosin setup with a Qnubu rosin press — their manual presses generate up to 300kg of force across 12 x 6cm plates, which is more than enough for these bags. You'll also want parchment paper for collection and a dab tool for handling the finished product. Already pressing? A silicone dab mat keeps your workspace clean and makes scraping up every last bit of rosin much easier.
You can technically press rosin without a bag. People do it all the time — fold some flower into parchment, squeeze, and hope for the best. The problem? You end up with plant matter in your extract. Little bits of leaf, tiny fragments of stem, all mixed into what should be clean oil. It dabs poorly, tastes harsh, and clogs up your rig faster than you'd like.
A rosin press bag acts as a filter between your starting material and the collection paper. When heat and pressure force the essential oils out of the plant, they pass through the nylon mesh while the solid plant matter stays trapped inside the bag. The result is visibly cleaner — you can see the difference immediately. Lighter colour, better consistency, and a flavour profile that actually reflects the terpenes in your strain rather than the taste of burnt chlorophyll.
These Qnubu bags are made from food-grade nylon, which matters more than you'd think. Cheaper bags made from polyester or low-grade mesh can degrade under heat, potentially leaching into your extract. At the temperatures and pressures involved in rosin pressing — Qnubu recommends around 90°C with 60 seconds of pressing time — you want a material that holds its shape and doesn't contaminate the output. The nylon mesh on these stays intact press after press. We've handled them after use and the weave stays tight; they don't stretch out or blow open under pressure like some of the budget options we've seen floating around.
The honest limitation: these are single-use bags. You can try to reuse them, but the mesh gets clogged with plant material after one press, and cleaning them properly without damaging the weave is more hassle than it's worth. At 10 per pack, you'll want to stock up if you're pressing regularly — figure one bag per press session as your baseline.
We've been selling extraction gear since before rosin presses were a thing people had in their bedrooms. The shift from BHO (butane hash oil) to solventless extraction has been one of the best developments we've seen — no flammable solvents, no purging, no wondering whether there's residual butane in your dab. Just heat, pressure, and a mesh bag.
The most common mistake we see? People buying the wrong micron size for their material. If you're pressing cured flower through a 25μm bag, you'll get almost nothing out — the mesh is too fine for the trichome heads to pass through efficiently. Conversely, pressing kief through a 160μm bag defeats the purpose entirely. Match the micron to the material. The size guide above will save you from wasting a bag on your first attempt.
One more thing worth knowing: the quality of your starting material matters far more than the bag. Pressing bone-dry, six-month-old flower through the finest mesh in the world won't give you good rosin. Fresh, properly cured material with visible trichome coverage is where the magic happens. If you can see the frost on the bud, you're in business.
A rosin press bag is a nylon mesh filter that holds plant material during heat-and-pressure extraction. It lets the essential oils pass through while trapping solid plant matter, giving you cleaner rosin than pressing without a bag. The micron rating indicates how fine the mesh is.
Technically yes, but the results drop off sharply. After one press, the mesh is clogged with plant material and residual oils. Cleaning them without damaging the nylon weave is difficult. Treat them as single-use for consistent results.
Qnubu recommends approximately 90°C with a pressing time of around 60 seconds. Lower temperatures (70–90°C) preserve more terpenes and produce lighter-coloured rosin. Higher temperatures (90–120°C) increase yield but can darken the output and reduce flavour.
90μm is the best starting point for flower rosin — it balances yield and purity well. If you want slightly more output and don't mind a bit more plant material, go with 120μm or 160μm. For hash or kief, drop to 25μm or 37μm.
Yes, you need a device that applies controlled heat and pressure. A dedicated rosin press — whether manual or hydraulic — gives you the best results. Hair straightener methods technically work but lack the even pressure distribution and temperature control that a proper press provides.
At 11 x 5cm, each bag holds roughly 3–7 grams of flower depending on how tightly you pack it. For hash or kief, you'll use less material — around 2–4 grams — since it's denser and extracts more efficiently.
Dark rosin usually means the temperature was too high, the pressing time was too long, or the starting material was old and oxidised. Try lowering your plate temperature to 80–90°C, pressing for no more than 60 seconds, and using fresher material. The bag micron size won't affect colour much.
Last updated: April 2026
