2 pack Water Bottle Holder Cage Lightweight Bicycle Bracket Alloy Aluminum

--Material: Aluminum Alloy --Color:Black   Lightweight and durable The bottle cage is made of high-quality aluminum, which means that the bottle cage weighs only 1.3 ounces. Quality design and guarantee The bicycle water bottle holder can firmly fix it on the mountain bike. No need to worry about it falling during driving. The smooth surface of the bottle rack will keep your bike safe. Adjustable kettle rack The water bottle holder can perfectly accommodate bottles with a diameter of 3". It can also be adjusted to fit bottles with a diameter of 2.7"-3". Without welding parts, the bottle holder is very flexible and will not break easily. Easy to install Four standard-sized screws are included in the package for mounting bicycle bottle cages. The enlarged mounting holes allow fine adjustment of the position on the frame. Bicycle frames require threaded holes to install the bottle cage.   How to Install : 1.Use a 4mm hexagon wrench (not included) to fix the cage in the screw holes on the frame. 2.The included screws are the standard size of the water bottle mount.   Package Includes: 1)2 x Bike water bottle cage 2)2 x Wrench 3)4 x Screw