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Harbor 4x4 Wood Post Cap  (3.5" to 4.5") Cedar or Redwood

Harbor 4x4 Wood Post Cap (3.5" to 4.5") Cedar or Redwood

Harbor 4x4 Wood Post Cap  (3.5" to 4.5") Cedar or Redwood
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Harbor 4x4 Wood Post Cap is offered in your choice of premium Cedar or Redwood. Each cap is crafted in Richmond, Vermont and available in a variety of 4x4 sizes from 3.5" to 4.5" square. 
  • Post Cap only - NOT a light
  • Materials: Clear, Vertical Grain Cedar or Redwood
  • Slip over style for easy installation
  • Fits a variety of 4x4 Posts: 3.5" to 4.5" square (See sizes below.)
  • Made in the USA
  • Manufacturer: Nantucket Post Cap
  • One year manufacturer warranty


Post caps are made of clear, vertical grain, kiln-dried redwood or clear western cedar. These wood types are known for their beauty and durability in harsh environments. Cedar resists mold and mildew, plus its low density makes it less likely to swell, warp, cup or twist, as compared to other softer wood types.  

Product Care:

Nantucket wood products are sold in their "natural" state so they can be stained or painted to match or coordinate with any project. Because post caps are installed horizontally on top of the post, they receive the most sun exposure. Although you may leave cedar posts to weather naturally, manufacturer highly recommends sealing all wood caps before installation. Apply an exterior urethane stain or paint to all surfaces, including inside and under the base, to ensure long life. Many semi-transparent seals are available for cedar to maintain its natural look, while still protecting the caps.


For a nail-free look, simply apply an exterior marine adhesive like 3M 5200 to the top of the post and slip the post cap over. Stainless steel nails may be used as an alternative, but not necessary.



Measure the length and width of your post for best fit. Order by actual post size. Base opening of post cap will be 1/8" larger to easily slip over your post and to allow the wood to naturally expand and contract. 


3-1/2" Post: Cedar/$16.00  | Redwood/$17.00
3-3/4" Post: Cedar/$20.00  | Redwood/$21.00
Full 4" Post: Cedar/$22.00 | Redwood/$23.00
4-1/2" Post: Cedar/$24.00  | Redwood/$25.00