The STIHL 49155002800 Nozzle Housing is a genuine OEM replacement component designed for various STIHL SG series sprayers. This essential part ensures the correct seating and optimal function of the spray nozzle assembly, contributing to efficient and consistent application. It is specifically compatible with STIHL SG 11, SG 21, SG 31, SG 51, and SG 71 models, providing a reliable fit and maintaining the sprayer's performance.