Bullet Points: 1、Easy to Install: It can be quickly and easily installed on the bicycle frame, and the CO2 cylinder can be mounted. The process surface anodizing adopts anodizing , which is more textured and not easy to oxidize. 2、Two Bottle Cages: It can be directly locked on the seat bow and transferred to expand and add two bottle cages. You can carry two bottles of water at a time to make drinking water at your fingertips.rack with two bottles makes you never thirsty anymore. 3、High-quality Material: Using high-strength aluminum alloy screw stainless steel, durable, high strength, good toughness, wear resistance and corrosion resistance. 4、Aluminum Alloy : Aluminum alloy integrated molding, using high-quality aluminum alloy 3D integrated forging molding, riding smoother, installation of bottle cage, stable and not falling off. 5、Lightweight Frame: The all-aluminum alloy lightweight frame, integrated forging technology + anode process, double kettle expansion, so that long-distance riding is no longer dry. You deserve it. Specifications: Name: Water Bottle Cage Conversion Seat Size: ABOUT 135*80*2 mm/5.31*3.15*0.08 inches Weight: about 108 g Material: 6061 aluminum alloy (T6 heat ) Suitable models: mountain road Fixed Gear for BMX Packing List: 1 * Bottle Cage Conversion Seat Notes: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.