1 HP Diesel Engine Paddle Wheel Aerator https://www.paddlewheelaerator.net/product/diesel-engine/12-impeller.html Adopt new patent water-breaking impeller. Higher and wider water splash with much faster RPM for super high aeration. Save machine buying cost and power consumption due to the professional water-breaking and parabola design. Adjustable impeller. Synthetic aluminum / magnesium electric motor, heat dissipation is faster at least by 30%. #304 L type/ Square type/ half circle stainless steel frame . #304, 25.0mm stainless steel shaft. contact mail: [email protected]