Made of good quality aluminum alloy, anti-rust, high strength, wear-resistant and durable Comes with the mounting fittings, Easy Install Two independent bars for mounting water bottle bracket with great stability and convenience. Holds two water bottles at the same time, great for long time and long distance cycling Behind the saddle mounting makes for easy bottle access and space saving Specification: Material: aluminium alloy Height: 96mm/ 3.8 inch Width: 110mm/ 4.3 inch Length: 57mm/2.2 inch Distance between two screw holes: 66mm/2.6 inch Package Includes: 1pc x Bottle Cage Holder Adapter 6pcs x Screws 2pcs x Spacers 1Pcs x Wrapped board Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!