The "WUG" series of cylinder guides to ISO 6432 and ISO 15552 are used as devices to prevent piston rod rotation in the presence of torque. They are used to perform multi-axis systems requiring high motion accuracy. Guides are available in single and double versions and come with self-lubricating bushings (for low or heavy loads) or circulating ball bearing bushings (for high speeds), except in sizes 12 and 16.