The genuine STIHL 42555000303 Extension with Adapter is a durable accessory designed to enhance the reach and versatility of select STIHL RB series pressure washers. Measuring 1000 mm (39 inches) in length and weighing 0.68 kg (1.5 lbs), this extension allows users to effectively clean hard-to-reach areas. It is specifically engineered for use with STIHL RB 200, RB 400, RB 600, and RB 800 pressure washer models, ensuring optimal performance and compatibility.