Myco Labs proudly offers the Microppose Original Synthetic Polyfil Monotub Adhesive Filter Disks, a product innovatively designed in 2018 through a collaboration with Microppose. These filter disks are tailored for mushroom monotub grow chambers, which typically feature six air flow holes. The package includes 6 adhesive filter disks, each with a 2.75" Diameter and 2.5-inch usable filter diameter, perfectly suited to seal holes up to 2.5 inches in size. Engineered for optimal density, these disks ensure the right airflow rate to promote healthy mushroom growth. There's no need to manually adjust or calibrate for airflow; users can simply peel the filters from their backing and apply them directly over the air holes in their monotub chambers. This ease of use ensures that mushrooms receive the necessary fresh air exchange (FAE) for optimal growth and maturation. Moreover, these filters serve as a protective barrier against foreign spores and contaminants, safeguarding your gourmet mushroom grows and minimizing the risk of contamination. These are the stock replacement for all the Grower's Select & Microppose Monotubs.