1Aluminum Alloy: Made of high quality aluminum alloy, the bracket has high strength, high hardness and is not easy to deform. 2Main Features: Lightweight design for small load, strong, wear resistant, corrosion resistant, the bottle holder mount can effectively resist harsh outdoor environments, and have a long service life. 3Easy to Install and Remove: Only needs to clamp the water bottle cages adapter to the corresponding bar and match the protective gasket. 4Wide Range of Use: The bottle cage adapter mount has a wide range of use and can be installed on bicycle seat tubes and handlebars, applicable installation pipe diameter is 18?37mm / 0.7?1.5in (adjustable). 5Application: The handlebar water bottle holder seat post mount is suitable for bicycles, road bikes, mountain bikes, folding bikes, etc.