LMI Pumps B936-362NI Series B Chemical Metering Pump, 4.5 GPH, 50 psi (3.4 Bar) Max PSI, 50/60 Hz, 240-250V AC, Aust, / NZ Plug Volt, 4-20 mA Input or pulse divide or multiply with Dual Manual Control, PVDF/PVDF, Ceramic Valve Balls, Fluorofilm™ Diaphragm, PVDF/Polyprel Seat & O-Ring, PE .375" OD,