Inner diameter (hose side): 20.9 mm Outer diameter (hose side): 30.3 mm Inner diameter (tube side): 40.7 mm Outer diameter (tube side): 50 mm Connection design: round Length: 28.9 cm Material: plastic Colour: black Weight: 62 g Hose connection system Round gap for the locking function of the telescopic tube Does not carry electrical current Compatible with the following device models: Kärcher KNT 4 Replaces the following original accessories: Würth Kärcher 2.863-012.0 .