The Spraying Systems 23504-08 is a cartridge that is placed Power Jet spray nozzles. It's orifice number determines the GPM range when used at the specified pressure. Cartridge is made with polyphenylene sulfide due to it's high temperature tolerance. This model features a number 10 orifice with a minimum flow rate of 2.8 GPM at 500 PSI and a maximum flow rate of 4.9 GPM at 1500 PSI.