De Mattia Flex Testers is used to measure the ability of soft rubber compounds, leather and similar materials to resist dynamic fatigue. It is also used to determine the crack growth of vulcanized rubber and leather. It measures the resistance to dynamic fatigue of vulcanized rubber and elastomers test specimen when subjected to repeated bending and extension. A key advantage is that the upper and lower grips both move in opposite directions, thus resulting in reducing the level of vibration and the noise. The instrument is fitted with an interlocked protection hatch. It has simple and high quality design with maintenance free operation and easy installation.