[High quality] The office chair casters are made of high quality PU, wear-resistant, lightweight, easy to replace and use, these casters can protect hardwood, laminate, ceramic tile, slate and all other hard material floors from damage and scratches [Applicability] Floor protection rubber office chair casters, suitable for most existing office chair models (lounge chairs, executive chairs, task chairs, rolling stools), easy to slide on hard carpet and polyurethane floor, very suitable for home or office, and can be used for a long time [Move smoothly and quietly] The office chair casters are always firm and easy to control when rolling. Five chair wheels are enough to support a large man sitting on a rolling office chair. It is a good choice to choose our wheelchair wheels to upgrade your chair and bring you a quiet working environment. [Easy Installation] Quick and easy installation. The universal standard size can be used as a replacement wheel for most office chairs and stools.