Hamster Toy Super Wide Runway Silent Running Disc Sports Training Jogging Wheel Guinea Pig Mice Small Animal Exercise Accessories Pet Supplies. What the sports running wheel toy can offer you is that it does not jam and runs more safely, preventing hamsters from pinching their feet during exercise. Stable and anti-rollover make small animals to play safely. Sport wheels toy can help small animal to exercise, consume part of their physical strength, not only play a role in decompression and boredom, but also help them maintain a good body shape. It is constructed of plastic material. There are two different sizes for you to choose: M, L Suitable for hamster, guinea-pig, hedgehog, squirrel, chipmunk, golden bear rat and other small animals. Item Name: Hamster Toy Material: Plastic Usage: Exercise Training Features: Bite Resistant, Silent, Wide Runway Size Details: M: LxW: 20cm x 8cm/7.87" x 3.15" (Approx.) L: LxW: 26cm x 10cm/10.24" x 3.94" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Hamster Toy