Do you need new castors for your Aluminium Chair EA 117/118/119 (on castors)? The castors are part of the original construction of Aluminium Chair EA 117/118/119. They meet the highest quality standards and are characterised by accuracy of fit. Castors are available for different floor types – hard floors (e.g. wooden floors) and carpets – and are sold individually (in chrome or black). In most cases, Vitra recommends replacing all the castors on your product at once to ensure a smooth and consistent rolling movement.