AR North America ROTOJET255-03 3 Max PSI 3700 AR Roto Jet 255 Nozzle This nozzle works well with equipment rated from 3000-4500 psi 4500 PSI, This nozzle works well with equipment rated from 3000-4500 psi 1/4 inch, precision ceramic surfaces provides long life and all products are Rebuildable