The Spraying Systems QPHA-6.5 ProMax Nozzle features a capacity size of 6.5 the equivalent of an orifice diameter of 0.094 inches. Tolerates a maximum pressure of 150 PSI. At the rated pressure of 10 PSI the nozzle handles a flow rate of 0.65 GPM. Body of the spray tip is constructed from polypropylene to resist build up and harsh chemical.