To suit nearly ALL Ducati singles of the sixties and seventies, to my knowledge. Ducati's original part number for the chromed steel versions of these parts are 0181-40-070 (flat 10mm), 0461-59-040 (cupped 10mm), and 0461-59-090 (cupped 12mm). Suitable for the stepped rear shock mounts, they are made in beautifully polished stainless steel. Fit and finish guaranteed fantastic. The listing is for the complete set shown.