Swivel armchair with fixed feet. Frame in rigid polyurethane padded with foamed polyurethane. External covering in cowhide. Zippered removable internal covering in fabric or leather upholstered with polyester wadding and edged with cotton tape. Four-spoke base, swivelling on fixed feet, in chrome-plated steel. Swivel armchair with castors. Five-spoke base, in chrome-plated steel. Castors in black plastic with safety brake for soft floors and carpets (type A); upon request, castors with soft tread are also available, in grey, with safety brake for hard floors in wood or marble (type B).