Used for marine boat propeller,ship propeller Fixed pitch propeller Material,Cu1,Cu2, ... ,Cu4 Approved by ABS,BV.CCS,GL,LR, SpecificationsUsed for marine boat propeller,ship propeller Fixed pitch propeller Material,Cu1,Cu2 ... . Including Main engine,Gearbox,Shaftings,FPP,CPP,Rudder propellers,Tunnel thrusters,Azimuth thrusters,Water jets,also Main propulsion assembly. marine propeller blade