ST-357.1 Orifice size 055 light blue . Rotating nozzle with ceramic insert. The increased tearing action of the rotating spray is ideal for hard surface applications, such as concrete graffiti cleaning or caked on mud on heavy equipment. Improved materials for longer life. Increases cleaning efficiency as much as 200%.Type: ST-357Nozzle orifice: 055 Light blueSpray angle 20°Pressure range: 1450 – 3625 psiInlet: 1/4 “F.Housing: brassColor of protective cap: BlackTemperature: 212 °F