Click now for guaranteed lowest prices on fence post caps. Made in the USA. Ball Cap. These caps fit a true 4" x 4" or 5" x 5" posts. Classy Solar Post Cap Manufacturer of mahogany and redwood post caps, finials, outdoor furniture, gates, arbors, and more.Island Post Cap is a national distributor of redwood, cedar and Copper Cap, Crown Regal, Signs, Sign markers, estate sign markers and more. quality building products including lattice, deckrail, post caps and planking. caps use rabbeted joinery for connecting the post Fence Post Caps by Atlanta Post Caps - a finishing cap for your fence or deck ESTATE POST CAPS 6x6 - White. ESTATE POST CAP- 4x4 white w/ copper top