"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, Stroke Length in. 2.36, Bore Diameter in. 2.56 low pressure cyl., 2.01 high pressure cyl. Full cast iron pump for long service life W-style cylinder design for superior cooling Pump head made of FC35 Grade cast iron Floating-type Swedish steel valves deliver much longer valve life Operates at slower RPM to run cooler and last longer Low Vibration Technology LVT features a dynamically balanced pump for smooth operation and long life One-piece cast iron crankcase has bearings on both ends of crankshaft for superior crankshaft support, not overhung crankshaft design Two-stage, 3-cylinder pump Produces 14.9 CFM @ 90 PSI Requires 5 HP electric or 9 HP gas motor 100 duty cycle 175 max. PSI 12.5in. dia. oversized flywheel for cooler operation Heavy cast iron flywheel provides extra momentum Connecting rod oil journals ensure that bronze bushings are lubricated Step-type piston rings ensure piston ring overlap for better compression Sight glass for quick viewing of oil level Replaceable crank journals and wrist pin journal/needle bearings Two-piece connecting rods can be rebuilt for superior serviceability High pressure piston wrist pins have needle bearings Uses single A-groove belt Intercooler helps cool compressed air for lower moisture content 5/8in. compression outlet"