In general, the powder coating nozzle have two types, round and plate. They are of different workpieces applications. Plate nozzle in general used in the workpieces with more narrow groves. Round nozzle in general applied into all kinds of shapes worpieces, it is widely divided into small, middle, big three specifications. The middle size is common used. For big plate workpieces which need automatic big spraying distance, it can also choosing big size nozzle, small nozzle is general used for complex small workpieces.