This accessory can be added to the Otello 18, Otello, Otello orthopaedic and Santiago mechanisms: it consists of an iron frame with a 20x20 tube structure and seating surface in electrowelded mesh and is raised by two pistons. The long chairs come in two different lengths: 140 cm and 160 cm. They are supplied with L-shaped supporting brackets, pistons, bayonets and double bayonets to ensure quick fastening of arms and side supports. They are easy to mount and work and good value for money.