[HIGH QUALITY MATERIAL]: Our hamster wheels are made of high-quality environmentally friendly plastic, which can be used for a long time. With multiple ventilation holes, it is safe and breathable, relieves stuffiness, and protects the health of pets [Unique Design]: The transparent design allows you to clearly see when training your hamster. Can play with pets, increase the fun of interacting with pets [Easy to install]: The ball adopts locking design. All you have to do is snap the two hemispheres and the cover into place, then gently press to shape. Simple installation [DIY Combination Toys]: This small ball can be connected to an external pipeline and grow infinitely, making your DIY combination more difficult for pet activities [Rodor Toys]: Plastic jogging balls provide a fun place for hamsters and mice at home. Great for small animals like hamsters, tezals, mice