This adapter is perfect for you if you have old hoses from your Kaercher vacuum cleaner and you need more length. The adapter allows you to connect two hoses together. The 'large to large' file is for approx. 46mm hoses with an approx. 50mm piece. 'Small to small' is for approx. 38mm hoses with an approx. 45mm piece. You may also be interested in these other products: