This series nozzles with 2-tooth,6-tooth,8-tooth systems,three parts:base,seal ring,fast release head.It is easy to release and fix them.with 3 kinds of screw:1/8",1/4",3/8". material: PPR,PPS,PVDF,spray angle: 50-110 degree,with different spray flow rate for your choice, 0.09-26L/Min,under 3kg pressure.