Hay Tedder (HT210) Number of Rotors: 2 Working Width (Approx.): 10-feet Horsepower Required (min): 15 HP HT Series Hay Tedders (HT625H) Number of Rotors: 6Working Width (Approx.): 25.7-feetHorsepower Required (min): 36 HP Hay Tedder (HT419H) Number of Rotors: 4 Working Width (Approx.): 19-feet Horsepower Required (min): 25 HP Hay Tedders (Models HT417-HT417H) Number of Rotors: 4 Working Width (Approx.): 17.1-feet Horsepower Required (min): 22 HP