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Synthetic Filter Discs (SFDs)

£4£33 (incl. VAT)

Synthetic Filter Disks are a specially made, high density filters used for filtering spawn jars/mason jars. They provide optimum air-exchange for your mycelium whilst keeping contaminants at bay. Used by professionals world-wide for more consistent results during spawn production.

We receive many emails a month from people asking why their spawn is getting contaminated and after a few emails back and forth, about 50% of the time, we find out that poor jar filtration and/or inadequate gas exchange is the culprit.

  • Specially made for mushroom spawn production
  • Premium Quality
  • Can be used repeatedly, forever.
  • More reliable than micropore tape or polyfill
  • 99.97% Filtration efficiency down to 0.22μm
  • Fits regular and wide mouth mason jars
  • Optional small disk for lid modification

Take the guesswork out of spawn production and use what the professions use to get the job done right.

Free Delivery on all orders over £40.

Backed by our 100% Satisfaction Guarantee.

£4£33 (incl. VAT)


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Additional information


70mm (Regular Mouth), 90mm (Wide Mouth), 10mm (Small)


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