Neptune 535-A-N4
Simplex Hydraulic Metering Pump, Series 500-A. 18 GPH at 100 psi, 350 psi Max Pressure. Carpenter 20, FKM O-Rings, PTFE Diaphragm. 0.33 HP, 115 Volts, 60 Hz, 1 Ph (Single Phase), TEFC - (Totally Enclosed Fan Cooled) Motor Enclosure.