Tight Leak Proof Seal - The wide mouth mason jar lids is equipped with a rubber stopper for easy addition of water and nutrient solution, and can be filtered with a PTFE syringe filter to create better growth conditions
Universal Design - The product is specifically designed for wide mouth mason jars, suitable for cans with a diameter of 3.38 inches/86mm. The lid is equipped with a thick sealing ring inside to ensure stability and prevent it from falling off
Air Filtration - Each wide mouth mason jar lid comes with Ruhr connector to ensure the installation of a PTFE syringe filter is sealed
Material - There are a total of 12 plastic Mason bottle caps, 1 pack of 20mm self-healing rubber stoppers (25 in total), 1 pack of 0.22um PTFE syringe filters (12 in total), and 1 pack of Ruhr connectors (12 in total)
Usage - Popular for mushroom and liquid cultivation, suitable for home mushroom cultivation, laboratory and small-scale production, DIY, etc
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