NOTE: Please measure the inside of your current post cap to make sure it’s 4.5″ x 4.5″ and that you have a Trex “Transcend” Railing. Trex produces many different product lines and railing post sizes. Our planter basket is a vinyl coated steel basket with a powder coated aluminum shaft. Our current model is a 12” coco liner basket which is used to plant flowers of your choice to cascade over the fence post. Coco liner included. Includes a post cap that fits a standard 4.5″ TREX Transcend Railing Post. The cap is offered in two colors, either Black or White.