Crane bells are made in Osaka, Japan. These traditional designs are timeless and produce beautiful, clear ringing tones. Stunning, hand-painted bells from Crane are designed to fit almost any handlebar. They are 50% louder than the small brass bells that are often not loud enough, and louder than typical "ding-ding" bells. Every bike should have such a bell. The diameter is 55 mm, and the clamp fits 22.2 - 25.4 mm. It offers a loud and clear ringing tone as well as a spring-loaded lever arm.