Features: Easy to install on cage with metal wing nut and one built-in bolt-. Bird rotating perch toy: made of natural wood, this rotating perch toy is characterized by a wheel- with five perches and a central bearing-, which can rotate in two directions. The rotation- speed can be adjusted by tightening or loosening the main- wheel bearing- screws. Make your bird happy and engaged, while reducing boredom and stress. Its- natural Wood- structure provides birds with additional opportunities to chew and grind- their beaks, and promotes the maintenance of healthy beaks. Interesting birdcage accessories: The rotating perch on this toy can help birds exercise, improve their balance- ability, stimulate the brain- and reduce anxiety. The unique shape of the perches provides excellent foot exercise. Specifications: Material: Wood Size: Approx.20x10cm/7.87x3.93inch Package Includes: 1x Bird Perch Wheel Toy note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.