What You Get: 1 x Adjustable Aluminum Alloy Bicycle Bottle Cage, 1 x Hex Wrench, 2 Silver Screws. Universal for most standard and oversized bikes and water bottles while keeping the bottle tight in the bikes water bottle holder during fast riding and bumpy trails. Adjustable Bike Cup Holder: The diameter of the water bottle holder is about 70mm to 80mm and can be adjusted to fit most water bottles up to 60-85mm in diameter. The adjustable and slim design ensures a tight fit and is great for road, mountain, hybrid, touring and electric bikes. High Quality Bike Bottle Cage: The bike bottle cage is made of high quality ABS plastic and heat-treated aluminum alloy very durable and robust. Perfect fit for any season and weather, not easy to rust or fade. A perfect bike accessory for cycling enthusiasts. Wide Applications: Expandable design to fit most standard water bottles, also easy to attach to your bike with screws, suitable for a variety of bikes including mountain bikes, folding bikes and other bikes with bottle cage mounting holes. It is a perfect bike accessory and will not wear off the bikes paintwork.