Check the listing for details. Blackburn Camber Carbon Fiber Water Bottle Cage. Condition: New. Listed at 49.99 USD. Blackburn Camber Carbon Fiber Bottle Cage:With so many carbon fiber cages already available, we figured that we'd only introduce a Blackburn version if we could make something that's better than the competition. And the Camber CF is just that.For starters, it has a flared mouth to improve the ease of bottle insertion. And unique reinforcing side ribs increase stiffness to boost strength and bottle grip. The lower cradle/bottle stop area is designed to provide more support for critical strength in an area where other carbon cages fail. And the whole thing is optimized for an ideal balance between quick bottle access and optimal bottle grip.Of course, it's lightweight - a mere 27 grams to be exact - but more importantly, it's strong. Strong enough that it's backed by Blackburn's Lifetime Warranty.100% carbon fiber construction27 GramsFlared mouth for faster bottle insertionUnique reinforcing side ribs boost stiffness and bottle gripReinforced lower cradle/ bottle stop area for added strength