Dom Monkii Clip - Bike Frame Adapter for Brompton, Dahon, and Terns (25-38mm tube), Fits Monkii Cage, Monkii Mono, Monkii Wedge Great solution for bikes without mounting holes, bosses, bottle-thread Easily attached to fork, frame, handlebars, seat tube, or down tube Allow you to have 2nd 3rd . water bottle cage on your bike A mounting platform for monkii water bottle cage, monkii frame bag, monkii tool bag, gorilla cage Wide range: fits tube between 25mm  38mm