This is a dog wheelchair from Aruken-sha. It's a two-wheeled type for medium-sized dogs. It's a custom-made item that I recently purchased on Amazon. It has been stored unopened, still in its original box. Custom-made size (see the 4th photo): A48 B35 C20 D23 E22 Adjustable. If you have a dog that fits these sizes, please consider purchasing it.