All Star Regenerative Air Blowers; Inlet Size: 2"; Outlet Size: 2"; Horse Power: 3.5; Amperage Rating: 21.6000; Cubic Feet Per Minute: 228 SCFM; Height (Inch): 17; Width (Decimal Inch): 17; Maximum Working Water Pressure: 89.00; Maximum Vacuum Water Pressure: 88.00; Overall Length: 17.00; Phase: 3-