Durable lever action clamp that securely attaches to round pipes, rods or railings found on wheelchairs, strollers and hospital bed rails up to 1.25 inch diameter. The ultimate flexible arm cup and drink holder for wheelchairs, strollers, and hospital beds. High-strength composite plastic cup holder is compatible with cups, cans, bottles or mugs up to 3.5 inches in diameter. The heavy-duty flexible goose-neck arm is very stiff and comes with a black painted finish. The 20 inch long arm supports 2 pounds fully extended in the horizontal (weakest) orientation.