The Design House White Pier Base is specially designed for mounting outdoor post-top lights. This post-top light accessory product is compatible with wood, masonry, and metal and built to withstand years of repeated use. This product has a standard 3-inch diameter fitter. Mount this with a post top light to perfectly illuminate walkways, driveways, porches, yards, patios or any outdoor locations. Constructed of cast aluminum for strength and durability, this pier base will help you entertain at night or add security and safety for years to come.