Feature:1. DURABLE ALUMINUM ALLOY: Made from aluminum alloy, the most suitable material for bike bottle holders, solid and durable.2. EASY INSTALLATION: Only two screws need to be fastened, it could be very easy to install it with the key.3. Stay hydrated while riding: The bike water bottle can be used quickly and easily when needed. Very suitable for road, mountain, hybrid, touring and electric bicycles. Multi-point support, so more stable.4. Multi-function: very suitable for mountain bikes, bicycles, strollers, wheelchairs. Suitable for installation on handlebars, seatposts, etc., as well as motorcycles, fishing umbrellas, etc. (pipe diameter range from 18-32mm). It can accommodate smaller bottles and cups within the 73.5MM standard.5. Durable quality matches your bicycle: High quality ABS material, heat-treated, strong and lightweight. The powder coating surface treatment and high roller polishing treatment match your shiny bicycle paint. Very easy to wipe and clean. The weight is only 42g/1.5oz.Specification:Name: Water Cup HolderMaterial: ABSSize: As shownPipe diameter range: 18-32mmAccommodating kettle: Within 73.5MM inner diameterColor: Black, BluePackage List:1* Cup holder1*Tool2*Screw1* Pipe clamp