1. Material safety: The hamster fitness ball is made of high-quality PC material with lock design, simple installation, convenient and fast use, safe for pets to play2. Hollowed and breathable running ball: There are multiple ventilation holes on the running ball, which are safe and breathable, and small pets can play in it the openings on both sides of the running wheel are designed to be more breathable, allowing hamsters to do aerobic exercise3. Transparent fashion ball: pets can play in the transparent big hamster ball, the owner can observe the pet's every move, cute and funny4. Easy to install: It adopts the lock buckle design, it can be formed by light pressing, and the installation is convenient please install the clip according to the concave and convex5. DIY pet toys: This small hamster ball can be connected to a hamster tube, extending infinitely, allowing you to DIY combinations and increase the difficulty of pet movement