Inputs Bore Diameter* Unit of measurement for Bore.* mmcm minches Rod Diameter* Unit of measurement for Rod* mmcm minches Stroke Length* Unit of measurement for Stroke.* mmcm minches Maximum Working Pressure* Unit of measurement for Maximum Working Pressure.* BarPa PsiAtm Pump Flow Rate Unit of measurement for Pump Flow Rate* Litres/Minute Gallons/Minute (UK) Gallons/Minute (US)