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Quantity:6pcs Type:Split-type Colour:Golden & Sliver Lid Material: Tinplate Lid diameter:70mm Fit for all Regular Mouth jars Unique new technology by Biomed Scientific ,by using luer adaptor to link syringe filter on lid for gas filtration .different from other brands that uses glue on lid. 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.