Syringe filter (13 mm diameter, 0.22 µm). Installed into a canning jar lid, the filter will keep contaminants out, while allowing for adequate gas exchange your liquid cultures. Syringe filter (13 mm diameter, 0.22 µm).
6Pcs Regular Mouth Mushroom Liquid Culture Lid, Grain Spawn Cultivation Mason Jar Lid with 0.2 micron PTFE Syringe Filter & 20mm Self Healing Injection Ports For Mushroom Growing Mycology WIDE Mouth Mason Jar Lids [16 Pack] for Ball, Kerr and More - Food Grade White Plastic Storage Caps for Mason/Canning Jars - Leak-Proof & Anti-Scratch Resistant Surface