【Reusable Sealing Lid】Made of olypropylene(PP), can withstand multiple high-pressure sterilization treatments and be reused.
【Sealed Injection Port】Made of butyl rubber material, with good air tightness, heat resistance, cold resistance, and oil resistance. After use, it will self repair and does not require tape for sealing. Already assembled on the lid, users only need to inject the spores directly into the jar.
【Micro Filter】Using PTFE 0.22um filter, allowing fresh air to enter the jar while preventing pollutants from entering.
【Easy to Operate】Users only need to find the appropriate jar to use with our lid together, making it easy for beginners to get started. Lids fit 86mm wide mouth mason jars.
【Package Include】There are 5 PCS lid with injection & filter port in the package.