This Texsteam 5004 Series is a Piston type metering pump rated at 160 GPD and pressure ratings up to 5,000 PSI. 3/4" plunger size. Ductile iron fluid end standard with stainless trim and Buna-N packing and o-rings. All Stainless fluid end, Viton, TFE, High Pressure or Aflas Packing optional. High Pressure packing increases pressure rating to 5,000 PSI. For options not shown here please contact us.