DCAP-1MSA 650 psi (45 bar) pneumatic hand pump, 3ft hose, 1/4" Male NPT process conn, 3 ft hose, 1/8" male gauge connection. An exceptionally durable hand pump for use in the field for doing pressure calibration, testing and custody transfer. Perform pneumatic field calibrations on pressure transmitters, switches or gauges using an external pressure calibrator as the reference.