Heidolph RZR 1 overhead stirrer with tools and accessories features 2 gears delivering 280 to 2200rpm with analog control. 115v 60Hz input motor is high torque, up to 100Ncm. Use code -32 stir shaft for slow speed, up to 250rpm and code -34 shaft for speeds up to 2200rpm. Universal stand and clamp are available not only in the standard height of 700MM, but also in Ace modified heights of 920MM & 1220MM.