3.5" to 6.5" Adjustable 4 piece post trim base by RDI

(5 Reviews)
$10.99 $9.99
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Calculated at Checkout
White - Earth - Sahara
Compatible w/:
All Sleeves and Wraps (3.5 in. to 6.375 in. square)
Lifetime - Limited
Trim Kits
How it comes:
4 - piece
Free Ground Shipping w/ $50 Order
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Adjustable 4-Piece Post Trim Base by RDI

Trim comes in 4-pieces that slide into one another creating sizes between 3-1/2" to 6-1/2"

For use when sliding over an existing post is NOT an option!

If you’re working on a deck or porch project and are looking to evoke the timelessness of beveled wood details, consider adjustable four piece post trim by RDI as an equally alluring solution for a fraction of the hassle and cost. Not only is this adjustable deck post base incredibly easy to work with, but it is just as attractive as any wood option. The flexibility this adjustable four piece deck post base offers makes it an appealing addition to any railing or deck, as long as your posts range in size anywhere from 3.5 to 6.5. Available in White, Sahara, and Earth, these post bases are sure to add polish to any job, whether you are a contractor or a homeowner making a few improvements.

Crafted using weather-resistant vinyl, RDI’s adjustable deck post base can withstand the elements and is incredibly low-maintenance. Plus, RDI offers a lifetime warranty on all of its products, so you never have to worry. As a bonus, Deck Expressions offers free domestic shipping on all orders over $50, so you can afford to stock up on everything you need to finish your project and make your home look great.


  • Post trim adjusts to fit posts from 3-1/2" to 6-1/2"
  • Great for Post Sleeves 
  • Works on any post size from 3.5" to 6.5"
  • Comes in 4 - pieces


  • White
  • Sahara
  • Earth

endurance-earth.jpg endurance-sahara.jpg 

Reviews (5)


Written by DONALD BERCHECK on 5th Sep 2017


Post trim

Written by KB on 17th Nov 2016

Trims were easy to cut and fit.Look great on the Post wraps.I put them at the top and bottom of my posts, Was looking to trim out the tops where the post meets the porch roof for years.

Look Classy

Written by undefined on 5th Feb 2016

These look classy and finished off my fluted wraps nicely.

Trim Kits and Post wraps

Written by Richard Vosheski on 26th Aug 2015

All of your products were great and they were all installed. My wife really likes them. Thank You!

vinyl post trim

Written by undefined on 20th Aug 2015

Product is very solid.

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