Heavy-duty carbon steel construction. 6 vane rotor with open ends and plain machined tips. 14.0" valve installation height (flg. - flg.). Installed zero speed switch. Drive: 3/4HP, 1725RPM, 208-230/460 volt, 60Hz 3 ph. Speed reduced with a winsmith right angle worm drive. Chain drive with guard. Demonstration video on file.