The part number tells you which airplane it's for. For an RV-10, all the model-specific parts start with a 10. So there is only one List, and it has all the parts (or most of them, anyway) available for any airplane.
If you scroll around, you'll find parts for the RV-3 right on up. For example, C-302 is a welded aluminum frame for an RV-3.
Sometimes, parts are builder-fabricated from stock. In those cases they'll show the generic part number like AA3-032X3/4X3/4X4', which is a stiffener angle formed from .032 2024-T3. Chapter 5 explains the part numbering system.
RV-3B, now working on the top tailcone skin, the last fuselage skin.