【High Materail】Made of aluminum alloy, the surface is anodized, smooth, rust-proof, and durable. 【Easy to Install and Adjustable】You can quickly install the tube clamp on your car without taking off any shifter, brake lever or seatpost, just clamp it. With our plastic spacers, you can mount them on almost any tubular handlebar and seatpost. You can also rotate the top half to fit your bike. 【Safe and Sturdy】The water bottle cage is very firm and safe when you ride on rough roads or ride fast. Great for bikes that don’t come with mounting holes or for adding a secondary water bottle cage Compatible with almost all types of vehicles, you can mount it on tubular handlebars or seatposts with diameters from 19-40MM. With our product, you can carry as many water bottles as you want on super long journeys. Bicycle Bottle Cage Mount Adapter Adjustable MTB Road Bike Handlebar Water Bottle Holder Seat Post Bottle Mount