This Base Plate Cover is designed to be used with the Regal 2 1/4'' (5.72cm) post. This 7.5'' (19cm) x 5.9'' (15cm) base plate covers up unsightly screws for a more cleaner appearance. It features two-piece cast aluminium and a premium powder coated finish that provides maximum durability with low maintenance. Simple and easy installation requiring less effort. 20-year limited warranty on material and 10-year on finish.