12 Synthetic Filter Discs 90mm for a Buchner Funnel and Cut Them fit"Wide Mouth" Size Used for Mushroom Cultivation: Amazon.com: Industrial & Scientific
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Filter, Disc, Syringe, 0.2 Micron, Medstream®, Female/Male Luer Lock, Sterile, each | McGuff Medical Products
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Synthetic Filter Disc - 90 mm : Shroom Supply
90 mm Synthetic Filter Discs - Set of 10 — Fungi Perfecti