The Kärcher 55533480 (formerly 5.553-348.0) is a genuine OEM replacement piston specifically designed for various Kärcher professional high-pressure cleaner models. This critical component ensures reliable operation and maintains the precise pressure output required for effective cleaning. Manufactured to Kärcher's rigorous quality standards, it provides a perfect fit and exceptional longevity. It is compatible with a wide range of HD series models, including HD 10/25-4 S Plus, HD 10/25-4 S, HD 10/25-4 SX Plus, and HD 10/25-4 SX.