Sand blasting finished, ultralight, strong and beautiful, it will be a absolute nice choice for both road and mountain cycling friends.Fits for 22.2-31.8mm seatpostAdapted to 3 directions, the bracket can be rotated 90 degreesCan expand and hang 2 bottle cages at the same time, carbon dioxide bottleUltra-light alumUltra-light aluminum alloy materialinum alloy materialItem: double bottle cage conversion colour:blackMaterial:aluminum alloysize:Single length 80mmPackage Contents:1 * Bicycle Handlebar Bottle Cage AdapterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.