MTM Hydro's Stainless Steel QC Nozzles 4 Packs offer superior performance and extended life as a result of our refined manufacturing process. This premium nozzle pack has 4 different fan patterns - 0°, 15°, 25°, 40°. These Stainless QC Nozzles are 100% tested for orifice accuracy and degree setting so you never have to worry about using an inaccurate nozzle. In addition to the meticulous testing process, MTM Hydro nozzles are manufactured with striations in the stainless steel to securely hold the pressed head of the nozzle and eliminate the possibility of the colored head falling off, as with competing models. All MTM Hydro nozzles are etched along the neck with the degree and size of the nozzle. For reference: 25045 translates to 25° size 4.5 orifice.