All Star Regenerative Air Blowers; Inlet Size: 2"; Outlet Size: 2"; Horse Power: 3.5; Amperage Rating: 21.6000; Cubic Feet Per Minute: 165 SCFM; Height (Inch): 23; Width (Decimal Inch): 24; Maximum Working Water Pressure: 155.00; Maximum Vacuum Water Pressure: 155.00; Overall Length: 24.00; Phase: 1-