What is the exact gpm for each nozzle tip???

Nozzles are designed a different flow rates. If the flow rate on the nozzle is low or than what the machine puts out the nozzle will come out at a higher pressure. If the nozzle orifice is larger than what the machine can put out the pressure on the nozzle will be lower. So GPM is kind of important. To make sure you don’t blow your pump

GPM is a function of pressure of your machine and the orifice size. A low pressure machine will use less water per minute. Otherwise these are universal if you have a quick disconnect.