HIGH BACK CHAIR: Upholstered seat and back, with fully upholstered armrest, Tilting mechanism, Aluminum base with castors VISITOR CHAIR: Upholstered seat and back, with fully upholstered armrest, Aluminum base with Glides MEDIUM BACK CHAIR: Upholstered seat and back, with fully upholstered armrest, Tilting mechanism ,Aluminum base with castors