Features: 1. This wheel has Silent Running & Slip Resistant Design. 2. This wheel is Beautiful ,simple and suitable for multi-pet to use. 3. This wheel has complete accessories,which are quiet useful ,easy to install, stable bases and make no noise at night. 4. Increase friction, anti-slip stripes, anti-slip stripes design: protect your pet from slipping due to inertia while running. Description: Hamster is a very sporty animal. If it is kept in a cage for a long time, its health will weaker than before,but installation of wheel can provide it with exercise it needs. Specifications: Condition: 100% New. Material: Plastic. Size:18*11cm/7.1*4.3" Package Included: 1 *running wheel toy(Other accessories are not included) Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.