This is a black bicycle bell. Bells are safety components and must be attached, but it's surprisingly difficult to decide where to put them. This bell can be installed neatly without getting in the way! It comes with adjusters for 22.2mm and 31.8mm handlebars, so it can be installed on either one!! 【Contents】 - Color: Black - Applicable size: 22.2mm to 31.8mm handlebars - Size: 55 x 53 x 15mm - Material: Aluminum alloy, plastic