4X4 Post Cap │ Green Slim Profile

Four by four olive green slim profile post cap. Fits Actual three and one half inch posts.

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It’s possible to enhance the beauty of your property fence without breaking the bank to do so. Our olive green slimline 4x4 post caps will transform your nondescript, uninspired fence and give it a distinctive look that you’ll only achieve with the addition of our ASA resin plastic post caps.

View our installation instructions here.

4x4 Post Cap (3.5") - Green Slim Profile 

  • Fits a standard (Nominal) post. (3.5” x 3.5” up to 3.75" x 3.75").

  • Slim Profile caps slide down the post 3/4” and are 4.5” x 4.5” 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! 


This product is only available in one size (4x4) and the nominal form. The lumber industry uses two terms to distinguish between wood that is cut when it’s still moist or green and wood that’s cut after it’s aged or kiln-dried. Nominal refers to wood that was cut when it was still green. Since drying the wood causes it to shrink, nominal posts are not true 4x4s. Their final measurements are 3.5” x 3.5”.

We’re proud of the fact that our entire line of fence post caps is made in the United States. We sell directly to customers, so there is no markup that you’d pay if you had to buy 4x4 post caps from a local authorized dealer. We offer contractor and bulk pricing as well.

Our olive green nominal 4x4 post caps are made of ASA resin, the same hard plastic that car and marine vehicle manufacturing companies use for their products. These plastic post caps are superior to wood fence post caps in every way. They are impact and UV resistant. They will never fade, discolor, or warp, and we’re willing to stand by that claim with a 10-year guarantee against discoloration, fading, or warping on every purchase of ASA resin post caps.

Our plastic post caps don’t experience the shrinkage and expansion that wood faces all year because the humidity levels change with weather conditions. That pushing and pulling weaken the wood over time. It also allows moisture to saturate the connection between fence slats and the support posts. ASA resin plastic post caps won’t just outlast the comparable wood post toppers; the cost is a fraction of what you’d pay for wood fence post caps.

Installation of our green slimline plastic post caps couldn’t be more straightforward, thanks to our patented SNAP-CAP system. There are two pieces to our ASA resin 4x4 post caps. The sleeve slides three-quarters of an inch down the post. It screws to the top part, but the screws will never show. Once installed, the post caps are 4 ½” x 4 ½” at the widest point.


Frequently Asked Questions


 Order online or 770-808-0200 to order by phone.