About This This 2-Pack features high-density polypropylene durability and resilience. Includes 8 Monotub Filter Disks, 2 liners and 8 Plugs. Optimized Air Exchange - It has 4 air holes with our signature 2.5" Monotub Filter Disks strategically placed to give mushrooms the best growth environment. Small but Mighty! 28 Quart volume measuring 12" x 12" x 12" OD, this chamber offers plenty of space while keeping the size compact. Incubation Control: With the provided hole plugs, easily manage airflow during the incubation phase, guaranteeing optimal growth conditions. Stackable & Sturdy: Designed with a stackable base that can support up to 10 bins stacked atop one another. Each monotub can support 150 lbs Ideal Quantity of Grain Spawn to use per tub: 32-48oz (1.0-1.5lbs) | Bulk Substrate: 4-5lbs Overview Brand : Myco Labs Material : High Density Polypropylene Tank Volume : 28 Quarts Special Feature : Stackable Product Dimensions : 12"L x 12"W x 12"H Item Weight : 4.3 Pounds Shape : Rectangular Specific Uses For Product : Mushroom Growing Style : Compact Color : Black