1/4 INCH METERING PUMP Stock Number: P-2044 Mfg. FMI Fluid Metering Inc. Model VO6231AD11 Rated 0 to 12 ML per min., 100 psi max .96 amp, 115v, 1ph, 60hz Stainless steel with ceramic piston 1/4 inch in and out (4) available Posted in Pump, Misc., Vacuum, Blowers.