4x4 Post Cap │ Black Pyramid Top

Four by four Black Pyramid Post Cap for wooden posts.

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Atlanta Post Caps has the only patented fence post caps on the market, and we’re proud that our ASA resin products are made in the USA. We offer a unique line of post caps that will free you from all the worries that people who have wooden post toppers face. Plus, our range of ASA resin fence post caps cost far less than comparable wood post caps.

View our installation instructions here.

4X4 Fence Post Cap - Black Pyramid

  • Comes in Nominal (3.5” x 3.5” up to 3.75" x 3.75") and Actual (4.0" x 4.0" to 4.6" x 4.6")

  • These caps slide down the post 1.5” and are 5.5” x 5.5” at their widest point.

  • 10 year guarantee against fading, discoloration and warping!

  • High impact, remarkably sturdy ASA resin. The same material used in automobiles!

  • Made in the U.S.A.

  • Quick and easy patented SNAP-CAP installation, built right into the cap!

  • Fraction of the cost of comparable wood caps.

  • Contractor and bulk pricing available!

We carry black 4x4 post caps from the pyramid series in both nominal and actual forms. If your wooden posts are between ½ and ¼ inch smaller than 4”x4” (3.5”x3.5” or 3.85”x3.85”,) you need to choose nominal post caps. If your posts measure anywhere between 4”x4” and 4.6”x4.6”, you should choose actual or true 4x4 post caps.

  • The fence post caps in this series are made of ASA resin, the same material that car and marine vehicle manufacturers use.
  • Our resin post caps are known for being impact and UV resistant, and superior to any vinyl fence post cap available.
  • ASA resin won’t suffer from warping, fading, or discoloration, and we’re willing to stand by that contention by guaranteeing all post caps that are made of ASA resin for ten years.
  • Thanks to our patented SNAP-CAP installation technology, our fence post caps are so easy to install that you’ll be able to do it yourself, and you won’t have to call a professional to do the installation for you. And you don’t have to worry about unsightly screws because, with our post caps, they don’t show.

Wooden post toppers get weaker over time because humidity fluctuations cause wood to contract and expand. Weather can be hard on wood, and erosion is a natural consequence of that. With our ASA resin fence post caps, the weather isn’t a problem. You won’t ever have to repaint them or reseal them to prevent decay or to keep gnawing critters and insects away.  

If you’re looking for a way to enhance your curb appeal or add a decorative element to your fence or deck railings, check out the white and black pyramid 4x4 post caps from the pyramid series or any of the rest of our ASA resin fence post caps.  We have a matching 4x4 flat top post cap as well.

 Frequently Asked Questions


Order online or by phone at 770-808-0200.