1 X Liquid Animal Rennet 2 oz. This single strength animal rennet is the highest quality of rennet available in the USA. NON-GMO and contains no caramel coloring. 1/2 teaspoon will set 2 gallons of milk in approximately 45 minutes. One ounce will set up to 24 gallons of milk. We do not offer this via Fullfilled by Amazon to ensure the rennet is fresh and kept refrigerated until shipped.