"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 V-type cylinder orientation for consistent cooling and bearings on both ends of crankshaft for excellent support. Max. PSI 130, Flywheel Diameter in. 10.5, Bore Diameter in. 2.56, Stroke Length in. 2.36, Required Power 4 HP electric or 5.5 HP gas motor, Dimensions L x W x H in. 15 x 15 x 15, Stages 1, Total Cylinders 2, CFM at 90 PSI 13.7. Full cast iron pump for long service life V-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 Single-stage, 2-cylinder pump Produces 13.7 CFM @ 90 PSI Requires 4 HP electric or 5.5 HP gas motor 100 duty cycle 130 max. PSI 10.5in. dia. oversized flywheel for cooler operation Heavy cast iron flywheel provides extra momentum 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 Uses single A-groove belt 5/8in. compression outlet"