Kaytee Mesh Run-Around Exercise Wheel for Small Pets ( 11-Inch Diameter) Stand this mesh wheel alone or hang it on the cage sides. The Run Around Mesh Wheel is constructed of pet-safe, durable, epoxy-coated metal to ensure quiet performance and resist rust. Uniquely designed, this mesh exercise wheel can be used in one of two ways. Either stand the wheel on the cage floor using the rugged wheel support base. Or, hang the wheel on the cage sides using the two small clips located at one end of the wheel base.