Exotic Nutrition Metal Flying Saucer Wheel - The Treadmill Wheel 11" Green - for Chinchillas, Prairie Dogs, Degus, Squirrels, and Rats Chew-proof metal exercise wheel with powder-coated finish for durability 11" size ideal for Hedgehogs, Degus, Sugar Gliders, Squirrels, Female Rats. 14" size ideal for Chinchillas, Male Rats, & Prairie Dogs. Ball-bearings create a virtually silent spin - "things roll quieter than they slide" Size: 11" diameter x 7" tall. Exotic Nutrition's Sandy Trimmer Strips can be stuck to wheel for nail trimming (sold separately). FAST, FREE SHIPPING! Avg 3 days! ZooPro sells exotic animal foods and accessories that are manufactured by Exotic Nutrition Pet Supply Company. Exotic Nutrition has been the industry leader of exotic animal products since 1998, specializing in sugar gliders, hedgehogs, prairie dogs, marmosets, degus, skunks, opossums, chinchillas, rats, hamsters, gerbils, squirrels, rabbits, guinea pigs, rodents, ferrets, chickens, bluebirds, wild birds, monkeys, marsupials, reptiles, amphibians, & more