The sector of metallic components for chairs has become very important for P.TRE Companys establishment. Almost total production is realized on the basis of specific customers requirements. For particular dimensional requests specific control templates are prepared in order to simplify the following phases of welding and/or assembling. The special care in selecting material as well as during the entire production process permit to obtain semifinished products suitable for following treatment of chromium plating which the client has to carry out. For the production of bended parts in wire we are working only for the delivery of components or semifinished products and the client proceed with the phase of assembling and welding where the singular technical production requirements often are too specific.