SQUARE POST SHELVING STARTER & ADD-ON UNITS SQUARE POST SHELVING STARTER UNITS Includes 4 Shelves and 4 Posts SHELVING ADD-ON UNITS Includes 4 Shelves, 2 Posts and 8 S-Hooks. Product No.   HS184872ZA-4 Size D x W x H   18 x 48 x 72" Wt. (lbs.)   70 Price Ea.   $217.93 Quantity: