500-S is fitted with a stainless steel nozzle. Stainless steel nozzles are most suitable for really tough conditions. The nozzle’s solid stainless steel tip is built to withstand intensive mechanical wear. This safety air gun was developed with the user in mind, and it is the result of many years of research. The 500-S is the most ergonomic safety gun on the market today. Fully complies with OSHA safety regulations and EU Machine Directive noise limitations. Patented.