Power trowel ST-30A 1,ISO9001 2,50-100 rpm driving speed 3,engine ... :LJ20 5.0HP 4,fuel economic Power Trowel Model:ST-30A ModelST-30ATrowel diameter (mm)800Number of blades4Driving Speed(rpm)50 ... can. 5.0HP 800mm Walk Behind Power Trowel Model:ST-30A