WRT Equipment Mill, Carbon Steel Contact Parts, Unit has rotating shaft, nine staggered blades going thru stationary fingers attached to wall of mill reducing lumps to -1. Grinding Chamber is 28" x 19", Unit is driven by 10 HP, 1200 RPM, 230/460 volt motor. Unitized on portable stand, overall dimensions: 45" x 50" x 7.5' tall.