One of the objectives on which P.TRE Company focalizes is quality in cooperating with the customer. A great part of our production range is characteristic for the necessity of coupling or assembling with other components especially during the welding phase. That means at the beginning an accurate definition of the form and dimension. Control in the production phase is very important, for this reason templates and specific checking fix\tures are prearranged. Quality partner is quality in cooperation becoming fundamental to speed, simplify and guarantee product quality.