The sanding sheets in the C470 and C430 set from Bosch Professional Accessories are specially designed for use with multi-sanding machines. To ensure that they fit the Bosch Home & Garden PSM Primo model, you should check the following points:

- The sanding sheets measure 102 x 62 mm and 93 mm, which are the standard dimensions for many multi-sanders.
- The Bosch Home & Garden PSM Primo model should support these dimensions, but it is advisable to check the specific requirements of the device in the operating instructions or on the manufacturer's website.

If the PSM Primo model accepts sanding sheets with these dimensions and hole patterns (in this case 6 or 14 holes), then the sanding sheets in the C470 and C430 set will probably fit.