Ametek-Lamb 115923-00 motor is 2-stage, 5.7 inch, 110-120 volt. Ametek Lamb Vacuum Motor 2stg 120v BB HE TF 115923 Vacuum Motor/Blower, Thru-Flow, Thru-Flow Discharge, Blower Stages 2, Number of Speeds 1, Open Enclosure, 122.0 CFM @ 2-In. Orifice, Vacuum (H2O Sealed) 100.4, Voltage 120, 60/50 Hz, 1 Phase, Max. Amps 10.8, Max. Air Watts 447, All Position Mounting, Thermal Protection None, Insulation Class A, Ball Bearings, Ambient Temperature 40 Degrees C, Body Dia. 5.7 In., Overall Height 6-3/16 In., Mounting Brackets Metal, Intermittent Duty, Average Life 500 hr.High Efficiency Group Motor Specs * Motor Type: Thru Flow * Discharge: Peripheral * Bearings: Double Ball Bearing * Sealed Vacuum: 100.4 inches * Maximum Air Watts: 447 * Maximum Air Flow: 122 CFM * Motor Speed: 23,700 RPM Optional