Do you need new casters for the ES 104 Lobby Chair? The casters are part of the original design of the Lobby Chair ES 104. They meet the highest quality standards and feature an accurate fit. The casters are available for different types of floors - hardwood (e.g., wood) and carpet - and are sold individually (in chrome or black). In most cases, Vitra recommends replacing all the casters in a product at the same time to ensure a smooth and consistent rolling motion.