Medline Walker Cup & Cane Holder easily attaches to 7/8 and 1 tubing. It attaches simply with only three screws, and it has a flip-up cup holder, that adjusts to hold a variety of bottle sizes. It also folds when not in use so it does not add overall width to the rollator, walker or wheelchair. Features: Adjusts to hold different size items Folds up when not in use Fits all Rolling Walkers (except 4900), Folding Walkers, Transport Chairs, Wheelchairs, and Bed Rails One count