Barley Crusher with 15 lb. hopper. If you plan on brewing 10-gallon batches, this 15-lb. hopper is right for you and worth the investment. Adjustable rollers on both ends keep gap spacing parallel for a uniform crush along the full length of rollers. Rollers feature 12 TPI knurl to efficiently pull the grain through, leaving the hull intact to form a quality filter bed for sparing. 1018 cold-rolled steel rollers, 6061 aluminum mill body and hopper, tool steel axles with oil-impregnated bronze bushings. Using a 3/8 drill-motor at 500 RPM gives you a crush rate of 6 pounds a minute making the big grain bills fast and easy. Includes a solid base with locators for centering on a 5-gallon plastic pail. Gap default setting is marked and set at .039 during assembly. Adjustment range is from .015 to .070 thousands of an inch.