Island Mahogany Post Caps by Nantucket Post Cap

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The final product price may change based on the combination of size / type / finish / style you choose.

Made from 100% Mahogany.  Size of the flat spot on top exactly matches the actual post size.  For example, if a 5-1/2" cap is ordered, the flat spot on top is 5-1/2".

Island Mahogany Post Cap:

  • Fits posts from 3-1/2" x 3-1/2" up to 9" x 9"
  • Available in specialty sizes of 3-1/2" x 5-1/2" and 4" x 6" 
  • Also available in custom specialty sizes - please call or email for pricing

How to choose the correct Mahogany 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.


Island Mahogany Post Caps usually ship within 2-7 business days.

Please see our return policy for additional details.