NEW REGULATOR RECTIFIER FITSKAWASAKI WALK BEHIND MOWER 21066-2071 SH637-12 21066-2071 210662071 SH637-12 SH63712 KW2071 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Rectifier Regulator - Voltage: 12V Source: Aftermarket