Post caps are ornamental accessories that serve a dual purpose — they add beauty to the top of the post while providing cover from the elements, which helps prevent cracking and splintering.
Standard 4x4 and 6x6 post caps are the most common size post caps 
and are ideal for covering the top of cedar, pressure treated wood, composite deck lumber, vinyl and metal posts on decks, fences, porches, mailboxes or anywhere a finishing touch is desired. 
Today you can choose from hundreds of eye-catching post caps made from wood, vinyl, metal, composite and glass. Some post caps are simple and conventional, while others are more elaborate and display amazing detail. Deckorators' decorative post caps by Maine Ornamental include tiffany-glass or metal post caps with solar LED lighting. Solar-lit post caps add an intimate glow without wiring or electricity.