A2z's Stiffness Tester has been designed for evaluating the stiffness and resilient of filter paper, laminated plastic, cardboard paper, light metallic sheets, foil, wire or other flexible materials up to 3mm thickness, and with rigidity not exceeding 10,000 stiffness units and brings new standards of precision measurement to these specialized phases of research and production testing. Through standardization of the length of material being tested, angle of deflection, and rate of loading, accurate and reproducible tests may be obtained.