Prevue Pet Products SPV90011 Wire Mesh Mouse Wheel Toy for Small Animals， 4-1/2-Inch， Colors Vary</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Wire mesh mouse wheel toy design prevents feet and tails from getting caught while pets are running</li><li>Great for providing exercise inside or outside of the cage</li><li>The wheel can also be securely hung on mesh cage sides</li><li>Available in 4 assorted colors</li><li>Measures 4-1/2-inch wheel diameter</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/51KQ%2BygxNBL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41fkh970UFL.jpg' noproxy></br>