Provides efficient handling of totes, trays, and other types of containers. Super Erecta Shelf construction provides positive placement and easy vertical relocation of slides if your requirements change. Includes four 5" (127mm) swivel casters in your choice of resilient or polyurethane tread. Lightweight and easy to maneuver. Triple-bay carriers are equipped with six S3C single slides (3 sets) and six S4C double slides (3 sets).