EMAX Industrial Plus 5HP , 80 gal. 208 230 460V 2 Stage 3 Phase Pressure Lubricated Silent Air System Electric Air Compressor 18.5 GPM 6 Bore Dia mm 18 Knee Boards 6 Bore Dia mm 18 Stroke mm 12 Crankshaft ID Stamp 4 Inlet 1 2" F Outlet 3 8" F Max Temp 140° F Oil Capacity (oz) 15 Weight 22 RPM 1750 Shaft Size 24mm Shaft Version N Shaft Type Solid Specialty Stainless Steel This series is also available in dual hose combinations The whisper series compressors reduce stationary compressor DBA ratings by as much as 25% A noise suppression device was first conceived by EMAX engineers after feedback from competitor compressor users revealed a large number of complaints regarding the extreme noise level of their compressors in a work environment