... .51lbsSteel props (heavy duty) I: 1,700-2,900mm, 54.01lbs2,200-3,900mm, 66.14lbs2,700-4,900mm, 77.16lbsSteel props (heavy ... -3,962mm, 50.49lbs1,991-3,505mm, 46.30lbs1,803-2,997mm, 40.34lbsHigh quality steel usedHardened couplers are adoptedLoad test ...