Marine composite material carbon fiber:

       Filling with light wood inside, it is more strength than foam.

       The weight is heavier than the propeller filling with foam, but it is much lighter than the carbon fiber                      propeller .

About the propeller hole: (can do the propeller holes depending on your requirements)

21-26 inch folding propeller holes are suitable for M4 screws

28-30 inch folding propeller holes are suitable for M3 screws

If you need the propeller, you can contact us.