Cambridge Copper Post Caps by Nantucket Post Cap

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100% real copper top over premium grade Western Red Cedar or Redwood.  Clear lacquer applied to copper top.  Will wear off over time if a patina look is desired, or can be re-applied.

Available for nominal post sizes of 4x4, 5x5, 6x6, 7x7, 8x8, 9x9, and 10x10.  Custom sizes available at no extra charge.  Please order the closest size larger than desired and put a note in the comments section during checkout what the actual post size is.  For example, if a 5-1/8" copper post cap is needed, the 5-1/2" cap should be ordered.

Molding depth: 1-5/8"

Cambridge Copper Fence Caps:

  • Fits standard wood posts from 3-1/2" x 3-1/2" up to 10" x 10"
  • Comes in dried Western Red Cedar or Redwood
  • Also available in custom specialty sizes - please call or email for pricing

Some copper deck post caps sizes are special order items.  Please see shipping information below.

How to choose the correct copper post cap size:

Nantucket Post Cap LogoNantucket Post Caps are sized according to the actual physical measurement of your post.  All post caps are made 1/8" larger on the opening then the actual post size you specify.  For example, if your 4x4 standard post truly measures 3-1/2" x 3-1/2", then you would choose that size and your cap would come with an inside measurement of 3-5/8" x 3-5/8". 

All Nantucket Post Cap products are made in the U.S.A.


Copper post caps for 3-1/2" - 6" posts usually ship within 2-3 business days.  Larger sizes are special order and usually ship within 5-7 business days.

Please see our return policy for additional details.