Each bag contains 2 pounds (900 grams) of hydrated Rye Berry. These bags are made in Colorado at an Altitude of 5,280 feet. During sterilization, the pressure cooker is heated to over 250 degrees Fahrenheit and achieves up to 20 pounds per square inch for the entire duration of the 2 hour cooking. This means that the grains come out entirely sterile and ready to use with fungi and mycelial cultures. We recommend that the bags be inoculated within 1 month of receiving, however our bags have worked perfectly even after 6 months of sterilization!!! Spore syringes, liquid culture, and agar work best with our corn bags. A 2 pound bag can handle up to 25mL of liquid inoculant. An important note: WE DO NOT CONDONE ILLEGAL ACTIVITY. DO NOT ASK US ABOUT GROWING ILLEGAL THINGS. PERIOD. Please reach out to us with any questions or product inquiries, as we will always do whatever is necessary to make the customer happy!