... 2:SS304/316,Steel... 3:Polishing and Machining finished.. motor/marine propeller stainless steel1,Material: Cu1,Cu2,Cu3,Cu4,Ni-Al ... of machine copper alloy propellers by means of co-operating with many ship design, marine propeller5,While quality is paramount, we know ... an important factor6. Packing: Wooden Pallet packing. stainless steel motor/marine propellers