Features： 1、STURDY MATERIAL - Made of high quality aluminum alloy material, light weight, which is sturdy and not deformed. The surface is treated with baking lacquer, so it has the characteristics of anti-corrosion, oxidation resistance, no discoloration and heat-resistance, which can provide you with riding services for a long time. 2、 FITS MOST WATER BOTTLE - Bike bottle holder reaches 8cm in diameter, and adopts a more user-friendly design. It has strong toughness, which can be adjusted finely to fit most diameter beverages or water bottles. 3、 SECURE FIXED SYSTEM - Bike bottle rack has been processed by polishing to prevent scratching the water bottle. Whether you're riding fast on smooth road or on rough roads, arms of the bottle cage can wrap around the bottle and hold the bottle firmly, so you don't have to worry about it falling out. 4、 PORTABLE - It is lightweight and portable, which will not add extra weight to the bicycle, greating for road, mountain, hybrid, touring and electric bicycles. 5、 EASY TO INSTALL - Each bicycle water bottle cage comes with 2 stainless steel bolts and a hex wrench, simply attach to any bike with pre-drilled holes using the screws to fasten bicycle cup holder. Specification： Material: aluminum alloy Size: about 14*7.5cm Weight: about 52g Application: bicycles, mountain bikes, road bikes, folding bikes, etc. Package List： 1*Bottle cage 2*Screw 1*Inner hexagon wrench