Abstract: As indicated in the title, this description relates to an improved metal framework, including several hooks, the ends of which are interconnected with a single cable threaded behind the tensioning hooks that is subsequently covered with a layer of polyurethane or another type of synthetic material, creating a vibration classification screening mesh unit, the polyurethane and the shape of the specially prepared mould in which the tensioning hooks and the cable both covered by the polyurethane mesh act as metal elements, helping to prevent the elastic deformations of the synthetic mesh and providing a robust consistency.