Bike Water Bottle Holder Durable Lightweight Aluminum Alloy Bike Bottle Cage for Road Bike/Mountain Bike Bicycle Equipment Features: *1. This bike water bottle holder is made of premium aluminum alloy, which is small in size, light in weight, no easy to deform, super durable for long-term use. It will not wear the bicycle frame, so you can use with confidence. *2. Easy installation: This product is equipped with screws and wrench, allowing you can finish the installation in 60 seconds. Screws are of standard size. It is recommended to use washers for fastening.? *3. This water bottle cage for bike can keep your bottle stay firmly and stably in the holder whether you\'re riding fast on roads or bumpy trails. No worry about falling off. *4. With this water bottle holder, you don not need to worry about insufficient water supply during riding. You can take your bicycle water bottle quickly and easily for drinking, maintaining strength and energy during cycling. *5. Suitable for water bottles of any standard size. The cage can be slightly bent to open or close for a more perfect fitting to the bottle. Ideal for road bikes, mountain bikes, electric bikes, etc. Description: *1. Quantity: 1 piece *2. Color: black/red *3. Material: aluminum alloy *4. Bottom diameter: 6.8 cm *5. Cup holder diameter: 8.0 cm Package includes: Bike Water Bottle Holder*1 Screw*2 Screw Washer*2? Allen Wrench*1