• A clear glass Ball jar with a white Microppose synthetic filter lid on top, designed for mycology applications, against a dark background.
  • Multiple white circular synthetic filter lids by Microppose, stacked and spread out against a black background, used for covering jars in mycological work.

    Microppose Jar Filter Discs

    $7.00
    Shipping calculated at checkout.

    These Jar Filter Discs from Microppose fit within the rim of your jar lid, enabling fresh air exchange in your mushroom spawn or liquid culture jar while keeping out contaminants. These fully autoclavable jar filter lids are perfect for promoting rapid growth of mycelium during mushroom cultivation.

    • Allows for maximum airflow without contamination exposure
    • Sold in packs of 10
    • Reusable and washable
    • Ideal for larger grain spawn Jars
    • Fits wide-mouth Mason Jars
    • Manufactured by Microppose
    Product Details

    Filters for Large Grain Spawn Jars

    Jar Filter Discs can be placed on top of a jar with ¼” holes to allow for maximum airflow in inoculated grain without compromising the environment. These are a great option for mycologist’s larger grain or spawn batches, as well as mycelium that thrive in higher oxygen environments or require a longer period of incubation.

    Usage

    Place on top of a drilled jar lid insert for mason jars, then screw the ring onto the jar to hold the lid filter in place.

    To wash, use a damp cloth with warm water.

    Specifications
    • Size: Fits 90mm Wide Mouth jars
    • Autoclave Ready: Fully Autoclavable, High-temperature resistance

    Material: Synthetic; Hydrophobic and oleophobic 70% recycled plastic materials

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    Microppose Jar Filter Discs