Qty 20 13/16" and Qty 20 1/2" Non sparking Alumina "ceramic" cylinders for grinding. Perfect for the 3Lb barrel or two for the 6 lb. This is a GREAT alternative to lead. Affordable and very efficient with the cylinder design will give optimal performance in grinding. Balls tend to roll when the cylinders will tumble causing shorter grinding sessions and better performance. 40 pcs approx weight 1.6 lbs.

13/16" & 1/2" Alumina cylinders. 40 pcs weight is approx 1.6 lbs.