1)boat marine propeller with 2 leaves 2)material:Cu1,Cu2,Cu3,Cu4,Ni-Al Bronze,Stainless ... Used for boat, yacht or ship. boat marine propeller with 2 leaves1,Material: Cu1,Cu2,Cu3,Cu4,Ni-Al Bronze, ... of machine copper alloy propellers by means of co-operating with many ship design, marine propeller5,While quality is paramount ... factor6. Packing: Wooden Pallet packing. boat marine propeller with 2 leaves