So small, yet so loud. Easy to reach with the thumb while keeping the hands safely on the grips. The VIENNA bell is like a high-quality brass instrument with its vibrant sound that can be heard clearly, even in a noisy environment. Thanks to the use of high-quality brass, a fine patina will develop over the course of time on the surface of the metal part. Features: - Housing made of brass used for making musical instruments - The Blue Danube engraving - Resonates for up to 6 seconds - Strong and clear sound, easy to hear in the forest and in the city - Suitable for all woom bikes as well as other bikes with handlebar diameters from 19 mm - 22.2 mm - 2.5 mm hex key required for installation - Not recommended for woom NOW models (which come with an integrated bell)