ITEM NAME:Ztto Bike Water Bottle Holder Ultralight Aluminum Alloy Bicycle Water Bottl F5D6 Ztto Bike Water Bottle Holder Ultralight Aluminum Alloy Bicycle Water Bottl F5D6 Material: Aluminum alloy Weight: About 41.5g Color: Black Package Contents: 1* Bicycle Water Bottle Cage 1* hex wrench 2* screw 4* gasket