Wiley Sample Mill, Complete with Small Feed Hopper with 4-3/4" X 4-3/4" Opening and Cover, Leading to A 7-1/2" Grinding Chamber with 4-Point Rotary Grinding Wheel, Replaceable Knives, Includes Screen, Carbon Steel Contacts, Driven by a 2 HP, 230/460v, 1750 RPM, 3/60 Cycle Electric Motor Thru V-Belt Drive. Complete With On/Off Switch. Appears to be in Good Condition.