Whether you're a beginner or an experienced cultivator, maintaining consistent airflow while managing humidity is critical in mushroom growing. Our 42-piece set of 2.95-inch monotub filter discs is thoughtfully designed for monotub fruiting chambers. Each disc is crafted from moderately dense, durable material that supports fresh air exchange while helping to create a controlled environment tailored to your growing needs. These mushroom monotub filter patches are 2mm thick and come with a strong adhesive ring approximately 0.2 inches wide. This design makes them ideal for covering air holes 2.5 inches and smaller on your fruiting chambers or growing containers. The filters stick firmly in place and are just as easy to remove when needed, offering a clean and efficient solution for customizing your growing setup. The set includes 42 adhesive filter patches, offering excellent value for mushroom growers with multiple projects or large-scale operations. They are compatible with most types of monotubs and other DIY or commercial cultivation systems. Whether you're using them for mushrooms, these filters deliver reliable performance and easy integration into your system. Their size, thickness, and adherence offer convenience while helping you optimize conditions in your mushroom monotub. With this value pack, you'll have everything you need to keep your fruiting chambers performing at their best.