Reproduction Honda stator or points cover gasket. This gasket fits on most all the four cylinder Honda's from the 70's. Check the list and the OEM part number to be sure.
Replaces Honda OEM part number: 30372-300-300
Fits Honda:
CB350F Four - 1972-1974
CB400F Super Sport - 1975-1977
CB500K Four - 1971-1973
CB550F Super Sport Four - 1975-1977
CB550K Four - 1974-1978
CB750A Hondamatic - 1976-1978
CB750F Super Sport - 1975-1978
CB750K Four - 1969-1978