FEATURES: ✔ SAFE - The axle-free design eliminates a dangerous center bar reducing the risk of fur/tail entanglement pet wrap-a-round curvature of the spine and other injuries. ✔ SILENT - Innovative dual ball-bearings create a whisper-silent spin. ✔ NON-SLIP - Running tracks are textured for excellent grip. ✔ SANITARY - Wheel completely disassembles for deep cleaning no nooks for feces to hide in. ✔ SECURE - Closed off design with front plate for privacy safety and containment. With natural bean-shaped openings and a pet-preferred solid black rear wall. ✔ HIGH QUALITY - Wheel stand cage attachment and hardware are made of heavy-duty metal other parts made of high-quality plastic. ✔ JOINT PROTECTION - The metal stand allows for give protecting your pet from joint pain caused by running on a hard fixed surface. ✔ IDEAL FOR - Hamsters (Teddy Bear smaller Syrians larger Dwarfs / Robos etc.) Gerbils Mice and other similar small animals (not suggested for chewers).