This handy  twin cylinder 3 CFM capacity PTO air compressor is driven by the tractors power take off shaft and is designed to quickly and efficiently pump up a tractors tyres when you have a puncture or are low or out of air. This unit is supplied with  a rubber delivery hose and tyre valve connector,this unit is a handy item to keep on your tractor for emergencies in the field.This compressor has a quick release coupling that fits easily on to your 540 RPM  6 spline PTO shaft.