18mm Jumbo Hex Tap with 3/4" External Thread and Washer: For use with Drums, Carboys, and other containers with 3/4" bung or screwcap with reducer well. Washer eliminates leakage. Unique assembly provides exceptionally smooth turning action, preventing the binding and stiffness found in other plastic drum faucets. PP, PE ,and natural rubber components. Typical applications include but are not limited to: water, juices, beverage, chemicals, essential oils, liquid food.