Small Animal Comfort Exercise Wheel Silent Spinner for Gerbils Hamsters Mice Chinchilla and other Small Animals , Color Varies Large size: diameter 17cm / 6.7 inch Made with pet safe materials. Easy to clean and resistant to odors Specially designed for quiet spinning .Encourage healthy exercise.For hamsters, mice, gerbils, or other small furry animals This is a fun way to exercise your small animal pets; relieves boredom and increases activity level they will love it and be entertained for hours Solid plastic running surface is super safe for pet's feet. Can be easily attached to wire cage Available in assorted colors