Environmentally Friendly Material: Made of high quality acrylic and plastic material, bearing is of good mute effect and durable in service life, which is sturdy and lightweight, non-toxic, wear and bite resistant. Smoothly and Safe: The aerodynamic design reduces wind resistance, enabling wheels to rotate more smoothly. The edge of the cylinder is polished, Smooth edges that won't hurt the pet's feet. And there are anti-skid patterns inside the running wheel, yourlittle friends will not slip due to inertia. Mute Running Wheel: Super mute, hamsters play at night, does not affect the owners sleep, encourage healthy exercise. Easy to Clean: Detachable bracket and wheel design makes disassembly easily, easy to clean. Increase pets exercise frequency to keep healthy. Easy to Install: The bracket less running wheel can be mounted on a wire cage or an acrylic cage for easy installation.the durability that lasts for years and rotating speed stability. And the circular edge set will make it more secure, sturdy.