These are the synthetic filter discs that are featured on our Quick Colonizing 5-grain Jars. They are thick reusable and have a filter level of .2 microns, the highest level of filtration available. These are for any wide-mouth canning jars. The self-healing injection port is made from a special blend of RTV high temp silicone and a polymer mix.
- 6 Filter Discs with self-healing ports
- 90mm Wide Mouth Jar sized
- .2 Micron Filtration level