[High-Quality Metal Materials]: The bearings are made of high-quality metal materials, which have good sound-damping effect, long service life, are strong, lightweight, non-toxic, heat-resistant, wear-resistant, and can withstand bites. [Stable and Safe]: The aerodynamic design reduces wind resistance and makes the wheels roll smoother. Smooth edges do not hurt your pet's feet. Comfortable and safe. [Silent Running Wheel]: Super quiet, hamsters play at night and do not affect the owner's sleep, encouraging healthy exercise. At the same time with nail polish, polish excess nails while playing. [Easy to Clean]: Detachable bracket and wheel design make it easy to disassemble and clean. Increase the frequency of pet exercises to maintain health. Non-slip design, not easy to get stuck. [Easy to Install]: It can be installed on a metal cage or an acrylic cage, easy to install and the speed is stable. The round edge sleeve makes it stronger, stable and durable. Function: All metal, durable and anti-bite, strong support point support, the shaft is not easy to shorten. All metal design prevents animals from biting. Used with nail polish, small pet nails while playing. Silent bearing design allows your pets to play safely without affecting the owner's rest and life. The stand design, one thing for two purposes, can be used directly in the cage or hung on the cage for use. Specification: Product name: Metal silent running wheel. Diameter of the running wheel: 23 cm. Running wheel width: 9 cm. Total width of the running wheel: 12 cm. Distance between the running wheel and the support: 3 cm. Products from LUOLV's store