Ceramic Ball Mill Internal Diameter

Used- paul o abbe ceramic ball mill used- paul o.Abbe jar mill, approximate total volume 30 gallon.Porcelain jar 21" diameter x 18" straight side.Driven by 1hp, 1/60/115/230 volt, 1740 rpm motor thru a reducer, ratio 9.3 to 1.Inlet & outlet with cover and.