Flow regulator capsule, 10 to 80 l/hr [5.5 to 42 GPH] assembly for amiad Chemicals and Fertilizers Injectors.Including O-ring. Flow rate alternatives for amiad fertilizers injectors: Red 10 l/h [5.5 gph]Yellow 20 l/h [11 gph]Green 40 l/h [21 gph]Blue 60 l/h [32 gph]Brown 80 l/h [42 gph]