Material Wood, Metal Color: Blue Target Species:Mouse, Gerbil, Hamster Suitable Size -- 7.48 inch diameter, 2.95 inch thickness, which is just the right size for small pets such as hamsters, mice, and gerbils. The classic spinning wheel design has been reinforced with radial stripes to increase friction and prevent yourhamster from slipping and falling. Exercise wheels encourage healthy exercise for small animals. Metal Bearing & Independent Bracket-- This design can not only be installed on the cage. It can also be supported independently by brackets. You don't have to be in the cage all the time. Quiet Hamster Exercise Wheel -- silent rotation, no noise. The wheel rolled smoothly and noiselessly. It is also very comfortable for pets to run on. Easy to Clean -- Made of lightweight, durable wood material, removable shafting for easy cleaning, just use a small amount of soap and water to wipe the smooth surface, can be quickly and easily clean. Trendy Appearance-- Seven color wheel roll up is very beautiful, and with your decoration design will be very integrated. Don't miss out on such a stylish sports wheel.