Description: 【Ideal for Mushroom Cultivation】: These Monotub Adhesive Filter Disks are specifically designed for replacing filter pads in mushroom growing supplies, ensuring air filtration and protection 【Suitable Fit】: Each filter pad measures approximately 0.2 cm/0.08 inch in thickness and 7.5 cm/2.95 inch in diameter, suitable for covering single barrel gas holes 2.5 inches and below 【Quality Material】: Made from cotton, these Mushroom Filters provide reliable performance and durability, essential for maintaining a clean and efficient growing environment 【Easy to install】: Simply peel the backing paper off the monotub filters and stick the filters over the holes in the monotub filter. They are simple to use and remove 【Package】: The package includes 24 pieces, offering ample supply for multiple replacements or large scale mushroom cultivation projects Specification: Material: Cotton Size Chart: Diameter: 7.5cm/2.95inch Thickness: 0.2cm/0.08inch Package Includes: 24 Monotub Adhesive Filter Disks Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.