Used 1/2HP Union Process Szegvari 1-S Series Laboratory Attritor. Tank capacity 1.5 gallon, working capacity 0.8 gallons. Media volume 1.0 gallons. Driven by a 1/2hp, 3/60/208-220/440 volt, 1800 rpm, ratio 14/1, thru varidrive variable speed gearbox.