BUCATSTATE Hamster Wheel for Different Hamsters-Running Wheel inner Dia is 26cm/10.2" and the Width of the runway is 10cm/3.9". Which base size is 22 x 20cm/8.6" x 7.9", total weight 1.08kg/2.4lbs. It's recommended for grown Dwarf Hamsters such as Roborovski hamsters, Dwarf Winter White Russian Hamsters, Lemmings, Mice, Teddy Bear Hamsters, Golden Bear Hamsters, Gerbils..Super Silent Hamster Exercise Wheel- designed with dual ball bearings to ensure the wheel glides smooth and silent. Come with a cork mat effectively reducing the friction and noise during running. Allows your animals to run comfortably and happily without noise at night..Safety & Easy to Use - The M gentle slope running wheel can buffer and slow down, also the running track is continuous without cracks or tripping problems, avoiding being thrown away and reducing the risk of fur/tail entanglement, pet wrap-a-round, the curvature of the spine, and other injuries..Adjustable & Stable- Equipped with an adjustable base, the variable height is between 28-35cm/8.9"-11" very stable and durable, you can adjust it according to the height of the hamster cage. The solid big & wide standing base it's available to put on a platform or any hideout offers your hamster a simple way access to the hamster wheel start to walk & run..100% SATISFACTION GUARANTEE- we strongly stand behind the great craftsmanship of pet supplies and provide the best customer experience possible. In case anything goes wrong, we will respond to your concerns within 24 hours. Order now!