Made with pp material and reinforced ball bearings, these casters ensure smooth, noise-free rolling on all surfaces. Perfect for office, gaming chairs, or desks, providing effortless mobility without scratching hardwood or carpet. Universal office chair casters, suitable for most standard office chairs equipped with 11mm/ 7/16-inch pole sockets. Compatible with Herman Miller, Staples and other major brands. It includes 5 casters for complete chair replacement - no tools are required during installation. Not suitable for IKEA Heavy-duty casters,Each caster can bear a maximum weight of 88-100 pounds. Protecting the floor from scratches and dents is an ideal choice for carpets, tiles or hardwood. Inspired by inline skate wheels, these casters glide seamlessly over obstacles like cords or uneven surfaces. Say goodbye to wobbly chairs—enjoy precision movement even in busy workspaces. Before purchasing, please unplug the wheels that need to be replaced and confirm whether the inserted valve stems are consistent.