Filter Discs are circular-shaped filters generally made of cloth or metallic wires. Metallic filter disc is a mesh of wires in a circular shape normally used to make a filtering device. The devices manufactured using filter discs are primarily used for filtering small parts of a substance while separating the unwanted elements contained in the same.
Besides the regular filter discs, synthetic filter disc is another type of the filter disc used by mushroom cultivators. The synthetic filter discs fit perfectly on a variety of canning jars that are commonly used by cultivators for production on a commercial scale. Use of such discs allows constant exchange of fresh air and prevents harmful contaminants from entering the containers.