Environmental-friendly materials: The hamster gym balls select high-quality environmentally friendly plastic materials to protect pets’ health well. It is made with the material of a new piece of PC, With interlock design, easy to install, convenient and quick 【Hollow channel】: The hollow design on both sides of the running wheel makes the running wheel more breathable and allows hamsters to do aerobic exercise. There are several ventilation holes on the ball, which is safe and breathable, and its small animals can play for a long time 【Transparent Ball】Pets can play in the large transparent hamster ball, and the owner can observe the pet’s every movement. Very cute 【Easy to install】: Adopts keyhole design, can be molded with light pressure and easy to install 【Combination Game】: This small hamster ball can be connected with outer tubes and unlimited extension, allowing DIY combinations to increase the difficulty of pets
