High-quality NorthStar belt-driven pump works with gas or electric motors and features a full cast iron pump for longevity, Low Vibration Technology (LVT) for smooth running and long life, a W-type cylinder orientation for consistent cooling and bearings on both ends of crankshaft for excellent support. Also features intercooler to cool compressed air for lower moisture content. Flywheel Diameter (in.): 12.5, Max. PSI: 175, CFM at 90 PSI: 14.9, Dimensions L x W x H (in.): 28 x 22 5/8 x 22, Required Power: 5 HP electric or 9 HP gas motor, Stages: 2, Total Cylinders: 3