Please Note - bike frame requires threaded holes for installation of cages. BRAND NEW 2 Packs Bike Water Bottle Cages Bicycle Lightweight Aluminum Alloy Bottle Holder Fits most standard or oversized bottles, sports drinks, etc. It allows you to bend it slightly to fit different bottles, bottle diameter around 3" will fit perfectly, it can range from 2.5" to 3.6". The bike bottle holder can be installed on various types of bikes such as downhill, mountain, road, hybrid, folding bikes and more. 4 x M5 x 8mm screws Included. The screws are standard size for water bottle mounts to most of bikes with DRILLED HOLES, and washers are suggested for tight fixing. Use the Allen key (included) to fasten cages in screw holes on frame. Heat-treated aluminum alloy and professional manufacturing process for extra strength and durability combined with low weight. Provide you the comfortable cycling. The bike cup holder has arms that wrap around the bottle for a secure and you can bend the cage to adjust it firmly hold so you don't have to worry about it falling out during your ride. 2 * Bike Water Bottle Holder, 1 * Allen Key, 4 * Screws. Fits most water bottles 23/24/25/26/27/28 OZ water bottles can fit snugly, other bottles like 30 oz, If the bottle is tall, then yes. Accurately, it is decided on the bottle diameter, min bottle diameter is 2.5inch, max bottle diameter is 3inch. The cage designed to flex enough to insert and hold standard water bottle securely, you can collapse to snug up bottle. High quality 100% aluminum alloy metal material, focused on texture, durability, metallic appearance, anti-rust. Super easy to install Use Allen key (included) to fasten cages in screw-holes on frame. Please Note - bike frame requires threaded holes for installation of cages. 2-screws Included, 56mm-71mm range for the mounting 2-screws distance, it is standard size, fit different brands of bikes. Flexible design It has arms that wrap around the bottle for a secure and firm hold so you don't have to worry about it falling out during your ride. Color: Black Material: Aluminum Alloy Dimensions: 6.1" x 3.15" x 2.95" Net Weight: 74g Quantity: 2 Pack