... propeller with 2 leaves 2)material:Cu1,Cu2,Cu3,Cu4,Ni-Al Bronze,Stainless Steel 3)Used for boat, yacht or ship ... . boat marine propeller with 2 leaves1,Material: Cu1,Cu2,Cu3 ... ,Cu4,Ni-Al Bronze,Stainless Steel2,Boat propeller are used for yacht, boat or ship3,We ... propellers by means of co-operating with many ship design, marine propeller5,While quality is paramount, ...