Mushroom Grow bags (100); for mycology.W/ INJECTION PORT, MicronFilter selling Patches Size Small 3-5lbs of grain or substrate. mushroom cultivation

This is a small plastic grain spawn bag with Injection port and filter patch included that maintains perfect humidity levels for your grain spawn while allowing gas exchange. The measurements are 5 inches by selling 19 inches and can expand to a with of 5 inches. the bags are heat sealable, and can be used in pressure cookers. These bags are perfect for beginner or advanced mushroom growers and can hold up to 5 or 6 pounds of spawn depending on spawn density. They can be used to sterilize substrate as well. These bags are reusable and .2 micron filter is resilient.