Feature: 1. Made of aluminum alloy, it has smooth surface, corrosion resistance, high strength, sturdiness and durability, and prevents deformation and damage. 2. Multifunctional adapter, with two water bottle holders, can carry gas cylinders or two water bottle cages. 3. The bracket can be rotated 360 degrees to fit the installation position, easy to install and remove. 4. Commonly used for seat tube, bend handlebar, straight handlebar, can be directly locked on the seat post to hang two bottle cages. 5. Suitable for handlebars with a diameter of 21‑31.8mm/0.8‑1.3in, suitable for various types of bicycles, including mountain bikes, road bikes and folding bikes. Specification: Item Type: Dual Bottle Cage Mount Adapter Material: Aluminium Alloy Product Color: As Pictures Shown Product Size: Approx. 78x82mm / 3.1x3.2in Double Bracket Spacing: Approx. 50mm / 2.0inProduct Weight: Approx. 105g / 3.7oz Applicable: For 21-31.8mm / 0.8-1.3in pipe diameterRotable: 360 degree rotation. Package List: 1 x Bottle Cage Mount Adapter2 x Bottle Cage Holder 4 x Mounting Screw1 x Gasket1 x Hex Wrench