Incredibell Brass Duet Bell Ring My Bell The Brass Duet is a traditional ding-dong bell with the rich, resonant ring of solid brass. It makes two clear tones that carry down a bike path, so people ahead know you're coming. The rotating dinger lets you set the striker where it's easiest to flick. Features Solid brass dome, a loud, resonant two-tone ring Rotating dinger, lets you customize where you strike the bell Adjustable strap, fits a range of bar diameters Brass, chrome, or black finish, choose a look to match your bike SPECIFICATIONSIntended Use Road, Commuting, Trail Dome Material Solid brass Dome Diameter33mm (1. 3")Handlebar Compatibility21. 7mm - 24mm | Incredibell | Brass Duet Bell Blue