The Zwick / Roell M-flow Plastometer is a unit used for measuring the rebound resilience of materials. It is designed for industrial testing applications where the resilience of materials is important. This Plastometer is a reliable tool from the reputable brand Zwick / Roell, known for producing high-quality testing equipment for various industries. It is a valuable unit for businesses in need of precise and accurate measurement of material properties. The user guide and CD installation comes with this device. It is a used model, but comes with an unused Power Control.