To suit nearly ALL Ducati singles of the sixties, to my knowledge. Ducati's original part number for the chromed steel versions of these parts are 0270-91-010 and 0270-37-010. These are made in beautifully polished stainless steel. Fit and finish guaranteed fantastic. The listing is for the complete set shown.
Add a handful of 3/16" ball bearings and you're ready to go.
Showtime.