Microppose 90mm Synthetic Filter Disc for Wide Mouth Jars 0.2 micron (12-Pack)
Microppose 90mm Synthetic Filter Disc for Wide Mouth Jars 0.2 micron (12-Pack) is backordered and will ship as soon as it is back in stock.
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Description
Description
Wide-mouth canning jars are a mycology staple — but the metal lid ring needs a real filter to make them sterile-safe. The Microppose 90mm Synthetic Filter Disc is sized to fit standard 90mm wide-mouth jars (Ball, Kerr, and similar canning brands), filtering down to 0.22 micron while staying hydrophobic and oleophobic so moisture doesn't clog the weave.
- Diameter90mm
- Filtration0.22 Micron
- Material70% Recycled
- ReusableWashable
- Pack Size12
Why Growers Choose This Filter
These synthetic discs are built to be reused, not thrown out after one batch — wash them, autoclave them, and put them back to work. The 0.22 micron rating keeps mold spores and bacteria out of your jar while staying hydrophobic and oleophobic, so condensation and oils don't compromise the filtration. Drill 1–2 holes in a metal lid, apply the disc, and add a self-healing injection port for a complete DIY sterile lid.
What's in the Pack
- 12x 90mm synthetic filter discs, 0.22 micron
Filter Disc Specifications
| Spec | Detail |
|---|---|
| Diameter | 90mm |
| Filtration Rating | 0.22 micron |
| Material | 70% recycled synthetic fiber, hydrophobic & oleophobic |
| Sterilization | Fully autoclavable |
| Reuse | Washable for repeated use |
| Fits | 90mm wide-mouth jars (Ball, Kerr, and similar canning brands) |
| Pack Size | 12 discs |
| Best For | Grain spawn prep, wedge transfers, long-term culture storage |
How to Use Your Filter Discs
- Drill 1–2 holes in a metal wide-mouth jar lid, sized to sit under the disc.
- Center the disc over the hole(s) and secure it under the jar ring, or add a self-healing injection port alongside it for a complete DIY sterile lid.
- Autoclave as normal — the disc is rated for repeated sterilization.
- After use, wash and dry the disc to reuse it on your next batch.
Frequently Asked Questions
What jars does this fit?
Standard 90mm wide-mouth canning jars — Ball, Kerr, and other common brands that use the same wide-mouth lid diameter.
Can I reuse these discs?
Yes. They're washable and fully autoclavable, so you can clean and re-sterilize a disc for your next batch instead of replacing it every time.
Do I need an injection port too?
If you want to inoculate through the lid without removing it, yes — pair the disc with a self-healing injection port for a complete DIY sterile lid that handles both gas exchange and inoculation.
Why hydrophobic and oleophobic?
Condensation and oils can clog a filter's weave over time, slowing gas exchange. A hydrophobic, oleophobic disc resists that saturation, so it keeps breathing well through repeated humid incubation runs.
