1、Bicycle bottle cage adapter is made of aluminum alloy with smooth surface, corrosion resistant to withstand harsh conditions. 2、The smooth surface ensures the security of your bicycle and can withstand harsh weather conditions. 3、Easy To Install: Tighten the screws to attach the bike bottle cage adapter to your frame, handlebar, seatpost or anywhere you like. Instead of worrying about your water bottle cage sliding down after you hit some big bumps or ten thousand miles, this adjustable bicycle water bottle holder adapter keeps your bike drink holder in place so you can ride harder and longer. Features: Bicycle bottle cage adapter is made of aluminum alloy with smooth surface, corrosion resistant to withstand harsh conditions. The smooth surface ensures the security of your bicycle and can withstand harsh weather conditions. Easy To Install: Tighten the screws to attach the bike bottle cage adapter to your frame, handlebar, seatpost or anywhere you like. Bicycle bottle cage adapter is almost compatible with most bike and water bottle brackets. With two pair adapter pads to fit your bike and makes it stable and heavy duty. Fits for Handlebars diameter: 19-33mm. Specification: Material: Aluminum alloy Color: Black/ Red/ Gold/ Blue/ Silver (optional) Size: 7.7*4.6*2cm/ 3*1.8*0.8in Weight: 47g/ 1.7oz Package list: 1 * Bicycle Bottle Cage Adapter 1 * Bicycle Bottle Cage Adapter