The back doesn't touch and the inside is flat! Wide depth and flat foot area! The Silent Wheel F (Flat) is a small animal wheel that uses large, stable bearings to reduce friction noise during rotation. The rotating parts are concentrated on the back of the main body, and the surface of the main body is flat, so the back will not be touched during exercise. And, the wheel body can be attached and detached just by twisting the bearing cover, making it easy to clean! Compatible with small animals such as degus, chipmunks, and hedgehogs. W 250 × D 140 × H 280 (mm) #Degu #SmallAnimals #Chipmunk #SugarGlider #Hedgehog #SilentWheel #Wheel #Cage *No box *Stored by an amateur. It was placed in the cage for about a week, and then removed and stored. Please refrain from purchasing if you are sensitive to this. *Please check the photos and details carefully before purchasing. *We also have many reference books, red books, manga, DVDs, children's books, etc., on sale! *For those who purchase multiple items, we will create a dedicated page and offer a discount. *Customers in Hokkaido, Kyushu, Shikoku, Okinawa, and remote islands, please be sure to comment in advance. *Please check the profile. *We will send it in simple packaging.