Used 500 HP Attrition Mill. Manfactured by IPEC. Model 7000. 72" diameter X 76" high Milling chamber with 6-rows of high-speed rotating discs with 3" wide x 4" high x 3/8" thick hammers. 4" diameter screw feed. 500 HP motor. Top discharge to dust collection system. Carbon steel feed hopper 9' wide x 8' long X 8' deep. Previous use nut shells (dry grinding).