Features1Bike bottle cage adapter is made of aluminum alloy, erosion proof to withstand harsh conditions. 2The smooth design ensures the security of your bike and can withstand harsh weather conditions. 3Easy To Install: Tighten the screws to attach the bike bottle cage adapter to your frame, handlebar, seatpost or anywhere you like. 4Bike bottle cage adapter is almost compatible with most bike and water bottle brackets. 5With two pair adapter pads to fit your bike and makes it stable and heavy duty. 6Fits for Handlebars diameter: 19-33mm.SpecificationSpecification:Material: Aluminum alloySize: 7.7*4.6*2cm/ 3*1.8*0.8inWeight: 47g/ 1.7ozPackage List1 x Bike Bottle Cage Adapter1 x Hex Wrench1 x Thin Protection Spacer1 x Thick Protective Spacer