This document introduces the features and characteristics of the Festo ELGA-BS series products. This series of products includes heavy-duty recirculating ball bearing guide EGC-HD-TB, recirculating ball bearing guide EGC-TB-KF, internal guide and toothed belt ELGA-TB-KF, internal guide and toothed belt ELGA-TB-KF-F1. These products have high speed, high acceleration, high repetition accuracy, long stroke, flexible motor mounting and other characteristics.