P/N 10003 VIAIR’s Medium Duty Onboard Air System is a pre-packaged compressed air solution that provides a 33% duty cycle 325C compressor, 2.5 gallon air tank, and all components needed to install basic vehicle-based pneumatics.Onboard Air Systems (OBA) are complete pneumatic systems intended to accomplish various tasks, depending on the kit selected. VIAIR offers OBA systems for smaller compressed air requirements that have a shorter duty cycle need, as well as other systems that provide up to 100% duty cycle and increased air volume by providing a larger tank for compressed air storage. Each Onboard Air System comes complete with compressor(s), air tank, fittings, pressure switch, relay(s), electrical connectors and all applicable accessories.