Highest quality, all-metal exercise wheel for pet Chinchillas, Prairie Dogs, Rats and other larger mammals. Saucer shape with ball bearing smooth and quite design. Completely silent. Solid metal stand, entire unit is 'chew proof'. Size - Running wheel is 14 inches across, height is 7 inches. Base size is 10 inches across. Non-toxic powder coat safe finish. Add our 'Sandy Trimmer Strips'(sold separate) for automatic nail trimming while your pet exercises! Note: We also offer a smaller version of this wheel for Sugar gliders & Hedgehogs!