The load-bearing member of a Steelflex Roundsling is made from Galvanized Steel Aircraft Cable wound in an endless configuration. This wire core is encased in a double-wall polyester jacket. A unique inspection window allows for easy inspection of the core for broken wires and corrosion. The result is a highly flexible, easy to use sling that complies with all of the current rigging codes. 400F Temperature rating, no wire rope backup needed, core inspection window standard.