This Metro TTE21C is a Top-Track stationary end unit kit for Super Erecta and Super Adjustable shelving. This kit is designed for 21"W shelf width (Shelves not included). This end unit kit includes 86"H posts in chrome finish. It also includes hardware necessary for connecting stationary end units to the Top-Track high-density storage system. NSF listed. Note: Stationery end must have a minimum of four shelves.