SPECIFICATION Length: 7.1 inches Width: 4 inches Weight: 35g/1.24oz The ROCKBROS water bottle cage was built to be used with both mountain bikes as well as road bikes. Choose the color that best matches your bike. Quickly install your water bottle cage and enjoy a secure-fitting water bottle holder even over the bumpiest of trails. Enjoy a secure-fitting water bottle cage to hold your cycling water bottle The ROCKBROS cage is made of aluminum alloy with a semicircular opening design, which is flexible and beautiful in appearance. The bottle cage is designed to secure the water bottle, ensuring that the bottle is firmly fixed in place even on fast riding or rugged trails. The flexible opening design of the bottle cage can accommodate oversized bicycle water bottles, 20-27.2 including 20.3, 24, 25 and 27 ounce/ounce (600, 650, 750 and 800 ml size) water bottles. The appearance is frosted, oxidized, beautiful, non-fading, smooth, and is unlikely to scratch the surface of most water bottles.