Manufactured with acrylic material, the posterior moulds are available in both Anatomical, Technical and WFA version. Cuspidal inclination of anatomical moulds between 25° and 28°. The term WFA (Wide Functional Area) indicates the type of occlusion done during the mastication, when not only one point of contact is affected but a large functional area of around 2 mm. The need to simplify and speed up the clinical and technical procedures.