NEW PERMANENT MAGNET MOTOR FITS MONARCH PUMPS 56539 82195 2590100 2590112 50501 W8931 M-2590112 1330185 4423720 16399 8110 M-4100 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Electric Motor - Voltage: 12V Rotation: Counterclockwise Shaft Outside Diameter: 16 mm Shaft Specifications: 6 mm Slotted Shaft Source: Aftermarket