Tapco U channel sign post manufactured from percent recycled steel. Rib Bak high carbon new billet sign posts are as much as percent stronger than other U channel posts. Engineered with a patented, ribbed back design that allows sign mounting on both the front and back of the post. Fast, easy installation using conventional tool..Please Note Prices, promotions, styles and availability may vary by store and online. Inventory is sold and received continuously throughout the day therefore, the quan.y shown may not be available when you get to the store..Uline stocks a wide selection of U Channel Posts and Metal Sign Posts. Order by pm for same day shipping. Over , products in stock. Locations across USA, Canada and Mexico for fast delivery of U Channel Posts..U channel posts are the most common post used throughout the United States. They are also one of the most economical choices for a sign mounting post. U channel posts are available in both green and galvanized..