The Double Bottle Adapter is part of the B-RAD™ system that allows you to fit 2 bottle cages side-by-side. Easy to access bottles and out of the way of legs Easy to install using existing cage mounts on a bike B-RAD Base component is required; sold separately COMPATIBILITY Requires use of a B-RAD mounting base Compatible with any bike frame that has 2 standard 64mm spacing bottle cage mounts (most modern frames) Hardware included is T25 Torx head SPECIFICATIONS Weight: 20g Material: 6061-T6 aluminum brackets Tools Needed: T25 Torx Torque: 3-4 Nm Max Load: 1700g Made in the USA The Story Wolf Tooth was founded to design and manufacture precision cycling products that emphasize function, performance, and reliability to meet the needs of our fellow racers and riders. We are a group of cyclists in Minneapolis, Minnesota that spend a lot of time talking about bike components. Like most detail-obsessed riders, we're always looking for new products that could make our bikes lighter, faster, more versatile, or more reliable. We pride ourselves on delivering premium products of the highest quality.