Synthetic Filter Discs are used by many mushroom cultivators. From those only using a few jars of spawn to act as spawn masters in commercial production, to those involved in smaller home cultivation. These synthetic filters discs fit precisely on a variety of canning jars that are commonly used by toady's cultivators. Usage of these discs allows a fresh, constant air exchange but prevents the entrance of unwanted contaminates.

Our synthetic filter discs are able to be used within a pressure cooker, steam sterilizer or autoclave. They are reusable, highly durable and have a filtration rate of 99.97% and will filter down to .3 microns

You're not still cutting whole filter discs into quarters simply to attach them onto a hole that you've drilled into a lid are you? Well if you are then the 50mm (two inch) filter discs is especially for you. Made of the exact material as all of our filter discs and with the same 99.97% efficient filtration down to .3 microns. These filter discs measure two inches in diameter (50mm). These two inch discs cover a one inch hole nicely which will allow for a greater gas exchange for your spawn/substrate. No more cutting and no more shredding of perfectly good discs for a one inch hole!

50mm Synthetic Filter Discs are designed for those who drill their own holes in their lids.

70mm Synthetic Filter Discs are designed for Regular Narrow Mouth Canning Jar Lids.

90mm Synthetic Filter Discs are designed for Wide Mouth Canning Jar Lids.

110mm Synthetic Filter Discs are designed for older, outdated 1/2 Gallon and 1 Gallon Canning Jars. If you are purchasing 1/2 Gallon Canning Jars from Myco Supply, and if you need Synthetic Filter Discs, then you want to order the 90mm size. The 90mm size fits perfectly in all wide mouth canning jars.

(Myco Supply can also have synthetic filterr disks custom made to meet your needs. Contact us for more information).