Polini clutch springs for Honda Dio SP, Dio SR, Honda Lead, and Dio ZX horizontal.
Apparently these can also work on single speed Vespa moped clutches.
Comes with 3 different strength spring sets.
Total length is about 22.6mm and they are about 7.2mm in diameter. Compare to your originals to be sure these will fit.
Polini part number 245.020