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Quantity:6pcs Colour:SilverLid Material: Tinplate Lid diameter:70mm Fit for all Regular Mouth jars Used for making mushroom liquid cultures.The Lid comes with a self healing injection for injecting culture and a PTFE syringe filter for avoid contamination .These lids can be used in a microwave, autoclave or pressure cooker.Our professional grade autoclavable regular mouth jar lids are built to be lab-quality, and made specifically for liquid culturing .Leave the lids a quarter turn loose while in the pressure cooker so air can escape, otherwise the injection ports will pop out.