1 set.
2 plates + 1 clutch disc + 6 pcs springs.
You can use your old 6 pcs screws. But if you want to change new ones, please check this:
https://www.changjiang750sidecar.com/products/cj750-m1m-m1s-12v-catalogue-page-015
Buy #34 (6 pcs in 1 set)