The carcass of SIDERFLEX belts consist of a brass coated steel fabric with low elongation characteristics, which gives the belt a high tensile strength. Low elongation is one of the most important points of SIDERFLEX belts: 0.25 % at reference load (10% of tensile strength) and max 2.5 % at breaking. The presence of a transversal reinforcement assures the best performances both for very long and heavy applications.