From The Manufacturer
Quick Ship - MetroMax® 4 "S" Hook Kit, add on shelving to existing units using (2) posts instead of four, Includes: (1) "S" hook & (1) corner plug, use (2) per shelf level when connecting shelves end-to-end
Images are for reference. Color, configuration, dimensions and what's included vary by model. See the spec sheet to confirm the exact details.
