Add style to your deck posts, lamp posts, mailboxes or gazebos! Plant your favorite flowers in these uniquely designed wraparound planters. Simply assemble around your posts and then plant for a beautiful finished look. Assembles in seconds, no tools or hardware needed. Planters have hidden water reservoir inside. Weatherproof up to -20°F, UV and shock resistant polypropylene. Center opening fits 4"-Diameter posts or 3" x 3" square post. 15½"W x 12"H x 13"D.