Electrically operated, dome type, sturdy, stable heavy body with resiliently mounted motor working on 220V AC 50 Hz single phase for vibration free performance with built in 5-speed regulator and a non- removeable swing out rotor. Complete with tube carriers. Maximum speed 3500 RPM. Neatly finished in stoving enamel paint. Sizes a. 4x15ml tubes. b. 6x15ml tubes. c. 8x15ml tubes.