Variable size stroke adjustment; allows the user to vary the volume and pressure per stroke Improved priming Improved stroke limiting mechanism Integral pressure adjustment vernier knob for fine pressure adjustment Directly connection to pressure modules consolidates two separate pieces into one when performing pressure calibration and testing Two " inch NPT pressure ports, one for reference (pressure module or gauge), one for UUT Compatible with optional Fluke-700PRV pressure relief valve designed to protect pressure modules from overpressure damage