Ametek Lamb MOTOR, 5.7" 120 VOLT B/S 2 STAGE THRU-FLOW #115737This motor is designed to fit several models including Eureka one speed 2 stage canisters, Filter Queen 31,350 and 500. Also, Mastercraft, Airway, Kingston, Royal and Kent. Motor 5. 7" 120 Volt Ball Ball 2 Stage Thru Flow Vacuum Motor, Single Phase, Motor Design Universal AC DC, Nameplate RPM 23,500, No. of Speeds 1, 120V AC Voltage, Full Load Amps 7. 8, Non Standard Frame, Motor Blower Type Thru Flow, Max. Amps 8 A, 60 Hz, Motor Thermal Protection