The Filters Extractor BHO Roller is a set of 50 replacement filters sized to fit the Roller Extractor BHO unit. Diameter is 33mm, which matches the column of the Roller tube exactly — no trimming, no folding, no faffing about with oversized discs that bunch up and let particulate through.
Why replacement filters matter for BHO extraction
Filters are the one consumable in a BHO setup you cannot skip, and running a dirty or torn filter is the fastest way to ruin an otherwise clean wash. These 33mm discs sit at the base of your Roller Extractor column and catch plant matter, lipids, and particulate as the solvent passes through — which is what separates a golden, pourable oil from a green, sludgy mess.
According to a 2023 review on cannabis extraction technologies (Ramirez et al., 2023), using liquid butane gas to extract cannabinoids from Cannabis flowers produces butane hash oil (BHO) with THC concentrations that can exceed 80%. That potency only holds up if your filter media stops everything except the solvent and dissolved cannabinoids — any leak-through drags colour and taste down fast.
From our counter: the question we get asked most often is "can I just reuse the filter from last time?" No. Filters are single-use. Butane residue, trapped wax, and torn fibres compromise the next wash before you've even started packing the column.
Specifications for the 33mm Roller filters
Exact fit for the Roller Extractor BHO column — 33mm diameter discs, 50 per pack. No other sizes work with this specific unit.
| Product | Filters Extractor BHO Roller |
| SKU | HS0662 |
| Quantity per pack | 50 filters |
| Diameter | 33mm |
| Compatible with | Roller Extractor BHO |
| Use | Single-use replacement |
| Cost per wash | Roughly 2% of the pack |
How to use the Roller BHO filters
Drop one filter into the base of the Roller column before packing your plant material. That's the whole job — but the order matters.
- Make sure the Roller Extractor is clean, dry, and at room temperature before you start.
- Place one 33mm filter flat against the base of the extraction column, covering the outlet completely.
- Pack your ground, dried cannabis on top of the filter — firm enough to hold shape, loose enough for solvent to pass.
- Close the unit according to the Roller instructions and run your butane wash in a well-ventilated outdoor space.
- Discard the used filter after the wash. Do not reuse — trapped residue contaminates the next batch.
- For a second wash on the same material, repack with a fresh filter. According to Skunk Pharm Research, the first wash typically extracts 75–80% of the available cannabinoids, leaving the rest for a second pass.
Safety note on butane extraction
This guide is written for adults. BHO extraction involves liquid butane, which is extremely flammable — always work outdoors, away from ignition sources, and never indoors. According to a 2019 clinical review (Jensen et al., 2019), bursts and explosions happen when pressure within a closed system exceeds the equipment's capacity to contain it, which is why using a properly designed extractor with fresh, correctly-sized filters matters so much. The 33mm filters keep flow consistent and prevent the kind of blockages that cause pressure spikes.
Complete your setup: pair these filters with the Roller Extractor BHO itself (the unit they're cut for) and a quality butane refill. If you're running bigger batches, have a look at the larger Extractor BHO models — but note those take different filter sizes, not 33mm.
What makes the Roller filters worth keeping stocked
Fifty filters gets you through roughly 25 two-wash extractions, or 50 single washes — enough to last most home extractors six months to a year depending on how often you run batches. Ordering one pack at a time is fine; running out mid-session because you thought you had spares is the annoying bit.
The honest limitation: these only fit the Roller Extractor BHO. If you've got a different BHO tube — alchimia's closed-loop, a generic 50mm column, or an AFS CRC setup — these 33mm discs will not work. Check your column diameter before ordering. Measuring takes ten seconds and saves a return.
Frequently Asked Questions
How many filters do I need per BHO wash?
One filter per wash. If you're doing a second pass on the same material to pull the remaining 20–25% of cannabinoids (as noted by Skunk Pharm Research), use a fresh filter for the second run — never reuse.
Can I use these filters with other BHO extractors?
Only if the column diameter is exactly 33mm. These are cut specifically for the Roller Extractor BHO. Other tubes — larger closed-loop systems, different brand extractors — use different filter sizes and won't seal properly.
Why do I need a filter at all?
The filter stops plant matter, lipids, and particulate from passing through with the solvent. Without one, your extract comes out green, cloudy, and full of debris — much lower purity than a properly filtered wash.
Can I reuse a filter to save money?
No. Used filters hold butane residue, trapped wax, and torn fibres that contaminate the next wash. At roughly 2% of the pack cost per filter, reusing isn't worth the risk to your extract quality.
What's the best way to store unused filters?
Keep them in the original packaging, dry, and away from dust or strong odours. Cannabis extract picks up contamination easily, so any filter residue from storage will end up in your final product.
How much BHO can I expect per wash?
According to BHO Extraction 101 research, yield depends on starting material quality and technique, but THC levels in finished BHO typically sit around 80% (Simple Extraction of Cannabinoids from Female Inflorescences, 2022). Expect roughly 10–20% of starting weight as finished oil on quality flower.
Last updated: April 2026
