The H1/8U-SS4010 flat fan nozzle has a spray angle of 40 degrees at a pressure of 3bar and a flow rate of 3.9L/min. It is usually used to wash the surface of moving objects. This is because the smaller the spray angle of the flat fan nozzle, the greater the impact force. It will be bigger, and the spray angle of 40 degrees, while ensuring a strong impact, can cover a larger spray range as much as possible, so if you want to use a nozzle to clean the stains that are difficult to remove on the surface of the moving object, we recommend You use a flat fan nozzle with a spray angle of 30-40 degrees.