These 3-inch polyurethane caster wheels are designed as a universal replacement set of five for most office, gaming, and desk chairs. Featuring non-marking material, they protect your hardwood, tile, carpet, and vinyl floors from scratches and dents, eliminating the need for extra chair mats. The wheels come with a standard 7/16 inch push-in stem compatible with most common rolling chairs, but it is recommended to verify your chair's stem size before purchase. Equipped with advanced bearings inspired by rollerblade wheels, these casters provide quiet and smooth rolling, reducing noise and vibration in your workspace. Their industrial-grade steel cores and precise ball bearings allow a heavy-duty load capacity of up to 880 pounds, ensuring stability and performance in demanding environments. Installation is quick and tool-free, making these caster wheels an ideal upgrade for maintaining a comfortable and protected floor surface while enhancing the mobility of your furniture.