"CANALETTO CURVE" and "FLEXIBLE LISTEL" are useful profiles for creating a “canal” on walls or plasterboard layers which are curved. The decision to use of one or the other will depend on the degree, or radius, of curvature. In fact, the Flexible Listel has a greater radius of curvature compared to that of Canaletto Curve, even if the laying technique is the same. A counterceiling can be created using Canaletto Double, Canaletto and the Curve Listels together.