The modular design of JUD pneumatic piston guides consists of a guiding element to transfer vertical and horizontal forces, combined with a pneumatic cylinder providing the power. Piston guides are available in different sizes and in either mild steel/cast iron or stainless V4A/316L steel. They can be installed with bearing yokes or support plates for a pillow block. The mechanical feedback unit provides outstanding, precise guidance even for fast running felts and wires.