Spawn Cultivation Mason Jar Lid

6Pcs Regular Mouth Mason Jar Mushroom Cultivation Lids feature innovative Luer adaptor technology that connects a high-quality .22 micron filter directly to the lid without glue, ensuring an airtight, leak-proof seal. These 70mm diameter green polypropylene lids fit all regular mouth jars and include a self-healing injection port for culture introduction. Specifically designed for making mushroom liquid cultures, these lab-quality lids are fully autoclavable, microwave-safe, and reusable. Compatible with pressure cookers (leave lids quarter-turn loose during processing to prevent port damage), these professional-grade lids by Biomed Scientific provide superior contamination protection compared to glue-based alternatives.