Item Type: Hamster Running Wheel_x000D_ Material: PP environmental resin _x000D_ Color: As Pictures Shown 1Use PP environmentally friendly resin material, non?toxic and odorless, environmentally friendly materials, small pets and owners are at ease. 2The thickened running disc is safe, stable and resistant to biting, and the thickened design of the wheel disc wall can effectively balance the rotation speed. 3Silent black technology, no noise during acceleration, high-quality durable bearings, substantial noise reduction, and high operating accuracy. 4Anti?slip lines, smooth bulge, prevent pets from falling down due to inertia. 5To prevent gnawing, the outer edge is rounded and polished to make it more sturdy.1 x_x000D_ _x000D_ RunningWheel 1 xFixed Axle 1 xNut Please note that the type and old type of this product will be sent randomly, and make sure you will not mind before ordering.