Curtis-Toledo offers both single-stage (110 psig max) and two-stage (220 psig max) oil-less air compressors. Standard features include totally dry crankcase (no oil disposal); slow-speed, smooth, cool operation; extended-wear pistons and rings (PTFE compound); hardened precision alloy cylinders with unique long-life surface coating; stainless steel valves; fully encapsulated main bearings; built-in after-cooler (13° to 10° F above ambient discharge temperature); and a choice of vertical or horizontal tank mounting.