Sutorbilt (Fuller Company) Rotary Positive Blower, Model: 5M-F. Approximate for displacement blower is 542 CFM, max pressure 13 PSI, maximum rotor RPM 2850, maximum vacuum 416 hg. Includes 4" FPT inlet and outlet. Driven by 25/6.25 HP, 1765 RPM, 460V, 60 Hz, 3-phase motor. Serial number 291912.