Oil lubricated pump runs quietly and reliably. Cast iron pump with Big Bore cylinder and piston is engineered to provide faster recovery time for improved performance. Powerful 2.5 HP 4-pole motor produces 4.2 CFM at 90 PSI for increased productivity. Pump runs at lower RPM (1,730) resulting in lower noise (79 dB) and improved pump durability. Low AMP draw reduces incidences of tripped breakers at start-up. Pump is oil-lubricated for cooler running temperatures and reduced wear. Roll-cage construction provides complete protection to withstand extreme jobsite environments. Large automotive style industrial air filter for increased air intake and greater efficiency.