Shaft size: 5/16" diameter x 12" long. Mixer blade is 2-1/2" diameter. Mixer position easily adjustable on sturdy support stand. 0-5000 RPM. Maximum overall height is 29-1/2". Small and compact. Will agitate up to 5 gallons of water. Variable speed control of 5,000 rpm by means of a rheostat with an OFF position. Calibrated dial for duplicating speeds. Motor is 1/15 HP, 120V., continuous duty in black enamel finish. Mixer blade and shaft of 316 stainless steel. For mixing low viscosity (water-like) fluids.