Make of high strength aluminum alloy, the product ensures excellent durability and resistance while being light weight. Suitable for handlebars with diameters of 22.2mm, 25.4mm, and 31.8mm, and is suitable for mountain bikes and road bikes. This bottle holder fits usual handlebars and seat posts. Adopting advanced fixed design ensures that the kettle can remain stable and not shake even on bumpy road. Package includes: 1pc Bicycles Bottle Cage Adapter