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Synthetic Filter Discs 90 mm, Wide Mouth Size, for a Buchner Funnel, Mushroom Cultivation, High Temperature and High Pressure Resistance (16 Pieces) : Amazon.co.uk: Business, Industry & Science
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64Pcs 20mm Diameter Synthetic Filter disc Hydrophobic PTFE Membrane 0.3um Pore Size Strong Adhesive for Mushroom Cultivation : Amazon.co.uk: Business, Industry & Science
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