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 polyurethane tread caster. Lightweight and easy to maneuver. Telescoping front and back frames on the APT1C truck permit a variation up to 8.75" (222mm) in horizontal distance between slides. These trucks can do "double duty" and accommodate containers from 15.5" (394mm) to 24.25"(615mm) in width. Easily adjusts with a socket wrench. Single-bay carriers are equipped with six S3C single slides (3 sets).