Environmentally friendly materials-safe, no odor, no cracks, strong and durable, not easy to wear and corrosion. Protect the health of pets. Transparent-The transparent design makes your hamster clearly visible when exercising, and you can play with your pet for added fun. Easy to install-both lids are designed with dark buckles. When installing, the hidden buckle position of the cover is aligned with the corresponding position of the running ball, and the cover needs to be tightened until it is screwed onto the head. The lids on both sides of the lid are entrance pets, with a small hole in the middle. You can fix the running ball on the bracket and fix it in the running wheel. Stay healthy-this ball allows hamsters to mix sports and exercises, making hamsters more enjoyable and more motivated to stay healthy. Do you want your hamster or small pet to have more fun Ball made of pet-safe material. Eliminates boredom, improves the level of exercise, and provides him with a good place to play. The ball is easy to install and is a good toy for hamster entertainment. This is a great toy for your small pet, just take it home. The package includes: 1 ball 1 box How to assemble a hamster plastic ball 1. Align the buckle positions of the two hemispheres, fasten them to the correct positions, and then turn slightly clockwise to lock. 2. When closing the top cover, please pay attention to align the four buckle positions, and then rotate to the right to fix it. 3. Put the hamsters in the plastic ball and watch them play on the flat floor. Precaution Please be careful not to use this product for more than 30 minutes, the mice will be very tired~ Please do not place it in direct sunlight. Remember to clean the inner wall of the flow ball after each use to keep the ball clean and tidy~