This is the E-Ne bell from CRANE, known for producing the world's most beautiful and best-sounding bicycle bells. Manufactured to the highest quality standards, this bell is finished with metal even for the mounting band, making it a truly beautiful-sounding compact bell. Installation is possible with one 3mm Allen key. Material: Brass Diameter: 37mm Mounting diameter: 22-31.8mm Color: Matte Brass There are some scratches and dullness. Please check the photos. Thank you.