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 ... ,bug boats,trawlers and fishing boats etc. Including Main engine,Gearbox,Shaftings,FPP,CPP,Rudder propellers,Tunnel thrusters,Azimuth thrusters,Water ...