Gems Sensors FS-200 Series Bronze Flow Switch, Inline, Shuttle Type, 1 gpm Flow Setting, 1" NPT Female Wetted Materials: Bronze, PTFE,316 Stainless Steel, Viton, Ceramic Electrical Termination: 18 AWG, 24"-26" long Polymeric Leads Switch Type: SPDT (20VA) Set Point Differential (Maximum): 0.15 Recommended Filtration: 150 micron