3 Lb. capacity Ball Mill . It has a full 3 pound capacity, and is the perfect size for the hobbyist / milling small amounts of other materials you want to reduce to a fine powder. The 3 Lb. barrel holds over 3 cups in volume. The barrel lmeasures 4.75" high x 4.5" in diameter. Grind most materials into a fine powder... or produce high-quality Black Powder / Rocket Propellant... in just a few hours. Includes 1 3 lb. Neoprene barrel with quick-seal, leak proof closures. Quiet, sturdy and simple to operate, this unit is built to last a lifetime. These units can also be used with liquid in the barrel without any worry of leakage. Continuous-duty fan-cooled motor that will never give you any problems. If grinding black powder use the hardened lead media. The ceramic will stain and the steel media will spark , not a good thing. NO GRINDING MEDIA INCLUDED. PLEASE ORDER SEPERATLY. All weights listed are shipping weights