YOU ARE BUYING 1 MAGNETIC SUMP BOLT WITH NEW WASHER. CX 500 Z-A-B 1978-1982. CX 500 CA-CB-CC CUSTOM 1980-1982. TO FIT HONDA. These parts are not necessarily endorsed by any motorcycle manufacturer. THIS IS THE SIZE LISTED IN MY PARTS BOOKS THAT YOUR BIKE WOULD HAVE LEFT THE FACTORY WITH WHEN IT WAS NEW.
