Gems Sensors FS-380 Series Brass High Pressure Flow Switch, Inline, Piston Type, 0.5 gpm Flow Setting, 1/2" NPT Male Wetted Materials: Brass, PPS Composite, Epoxy, 316 Stainless Steel, Fluorocarbon Electrical Termination: 22 AWG, 24"-26" long Polymeric Leads Switch Type: SPST, N.O. (20VA) Set Point Differential (Maximum): 0.2 Recommended Filtration: 100 micron