The Silent Spinner is a wonderful, whisper-quiet workout wheel for hamsters, mice, and gerbils. This patented ball bearing technology makes these wheels super-silent - perfect for bedroom cages! The Silent Spinner can be either free-standing or attached directly to any wire cage. Made from high-quality plastic, the running surface is safe and comfortable for your furry friend's feet. Size: Gaint 30cm (12") - For chinchillas, rats and other small animals Regular 16.5cm (6.5") - For hamsters mice and gerbils Mini 11.5cm (4.5") - For dawrf hamsters, mice or other small animals This wheel comes in red, green, blue or purple. Your colour will be selected at random, if you have a prefered colour please call us on 0113 2797474 and we will be happy to help.