Feature: Dimensions: 82mm Long x 30mm tall x 80mm wide Mounting Hole spacing - 66mm (measured center to center) Interchange Part Number Rectifier: 31700-333-008 Regulator: 31400-300-035 Compatibility Please make sure the interchange part number matches the part you are replacing. Please check our photos and make sure the part shown looks identical to your stock one. Fits Honda: CB350F - 1972-1974 CB400F Super Sport - 1975-1977 CB500K - 1971-1973 CB550F Super Sport - 1975-1977 CB550K - 1974-1978 CB750F Super Sport - 1975-1978 CB750K - 1969-1978 Note: The white 5 wire connector plugs into the stock wiring harness, replacing the old rectifier. The 3 male spade connectors plug in where the old regulator connected. Corroded / loose / damaged wiring is a very common cause for charging system issues, make sure all connections are clean and secure. This unit will not just bolt on where the old rectifier was, you must find a place to secure it after removing the stock regulator and rectifier. The body of the unit does not need to be grounded. You must have a fully charged battery in perfect working order before installing a new regulator rectifier.includes:1 x Regulator Rectifier Voltage