[High -quality materials]: Our hamster wheel is made of high -quality environmental protection plastics and can be used for a long time. There are multiple ventilation holes, safe and breathable, which can relieve boring and protect pet health [Unique design]: The transparent design allows you to be clearly visible when training hamsters. You can play with pets and increase the fun of interacting with pets [Easy to install]: The sphere is designed with a lock design. All you have to do is to buckle the two hemispheres and lids in place, and gently press to form. The installation is simple [DIY combination toy]: This small haouse ball can connect to the external pipeline and grow infinitely, allowing your DIY combination to increase the difficulty of pet activities [Rodor toys]: Plastic jogging balls provide a fun place for hamsters and mice at home. Very suitable for small animals such as hamsters, tazar, mice. Material: PP, sphere diameter 12cm, [Method] On the indoor and outdoor flat floors, put the hamster into the running ball, cover it, and place it on the ground to use.