ITEM NAME:Mountain Bicycle Bottle Cage Conversion Seat Bike Water Cup Holder Conver OZ Description: Features: Fashion and special design This kind of bicycle bottle holder is a good accessory for bicycle that is easy to install and remove. It is suitable for any bike frame or handlebar, and can effectively save your space. The useful tool for bicycle enthusiasts and you deserve it! - Specially designed for mountain bikes - Easy to install and convenient to use - Secure the kettle to the bike - 360 degree rotatable design for easy use Occasion:Bicycle Specifications: Color:Black Material: Plastic weight:about 50g Application: fit for 18-32mm Pipe diameter Package Included: 1 x Bicycle Bottle Cage Conversion Seat 2 x Gasket Note: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same..Secure the kettle to the bike. This kind of bicycle bottle holder is a good accessory for bicycle that is easy to install and remove. The useful tool for bicycle enthusiasts and you deserve it! - Specially designed for mountain bikes.