These hard chair casters are specifically designed for use on carpeted floors and come in a set of five. They are ideally suited for various chair models from the COMFORT, COMFORT PLUS, ECONOMY, and ECONOMY PLUS series. Due to their sturdy construction, they ensure optimal mobility and durability, making them an ideal choice for office environments. The casters are designed to facilitate the mobility of the chair while simultaneously protecting the floor from wear. This product combines efficiency with functionality to meet the demands of technical purchasers.