【Material】: The hamster exercise wheel is made of wood with a smooth surface and long service life, making it a great choice for your pet hamster 【Waterproof design】: The hamster wheel features a waterproof coating that helps reduce damage from moisture exposure 【Cork running pad】: The runner wheel includes a cork pad to increase traction and help prevent your pet from slipping or getting injured while running 【Adjustable height】: The small animal exercise wheel has an adjustable height to help prevent accidental collapse 【Easy to install】: The hamster wooden silent wheel comes with detailed installation instructions for easy setup Specification: Material: Wood Size Chart: Wheel diameter 25cm (9.84 inches), height 25cm–35cm (9.84–13.78 inches), width 9cm (3.54 inches) Package Includes: 1 x Hamster Wheel Note: Please allow slight measurement variations due to manual measuring and display differences. Customer satisfaction is our primary concern. If the product arrives damaged, please for assistance. We will do our best to provide a satisfactory solution.