Sewer Jetter Nozzle Button Nose 3/8" F 4.5 Orifice Size 4000 PSI Sewer Jetter Nozzle Button Nose 3/8" F 4.5 Orifice Size 4000 PSI Max 4000 PSI 4.5 Orifice Nozzle Size made of Stainless Steel Material. One Forward Jet and 3 backwash propulsion Jets on the Nozzle.