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Post Extension Kit - 4-Pack

Post extension kit to lengthen posts

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Due to COVID-19 disruptions, please allow 5-7 business days for your order to ship.

Increase your vertical storage space by stacking two wire shelving units or simply add height to your existing unit with this simple plug and bolt set. Read more

Note: To make our Post Extension Starter Kit compatible with other brands of shelving, an extra 4 plugs are needed for the new posts to match our threading.

MSRP: $29.98
Starting at $17.99
You save $11.99!

Availability: Usually Ships in 1 to 2 Business Days
Product Code: SI-POSTSKIT

For Shelving, Inc. Brand Posts - [MSRP: $29.98] Our Price: $17.99
For Non Shelving, Inc. Brand Posts - [MSRP: $53.32] Our Price: $31.99


Simply remove the black post caps on your existing posts, insert the splice connector, then remove the leveling feet and screw the bolt into the post. Put the post with the bolt end into the post with the splice top and push in securely (this last step may require a mallet).

  • Threaded bolt is 1/2 inch thick, 12 threads per inch
  • Design allows you to easily screw your top post into place
  • Units can be separated later to accommodate your changing storage
Product Details
  • Includes 4 bolts and 4 plugs
  • Kits for non Shelving Inc. brand posts include an extra 4 plugs
  • Fits in 1" round post
  • Max. height for two shelving kits: 12 ft.
  • Manufacturer: Shelving Inc.
Assembly Info
  • Replace the black plastic post cap with the metal plugs
    • A rubber mallet is recommended in order to secure the plug in place
  • Screw the threaded bolt about halfway into the plug
  • Screw the top post into place and repeat the process for the remaining posts

Note: Will add another 1/4" to the overall height of your unit on SI brand posts or 1/2" with other brands.

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