This post should be used with Supreme Letter Lockers or Armadillo Mailboxes that will be installed directly into the ground with a concrete pour (similar to a fence post).  

Due to material shortages around the world, the posts materials are changing depending on what is available. We are offering the Aluminum Square Posts and also Steel Round Posts. This is honestly based on what is available from manufacturers. 

Our Aluminum posts are: 

• Constructed of 1/8" thick extruded aluminum, grade 6061
• In-Ground Posts include 1/4" aluminum top plate 
• Measure 4" square
• Recommended for dry to damp climates due to its resistance to rust.  

Please use the table below to find what post should be used for your setting.  

Printable 36" In-Ground Aluminum Post Specifications

Letter Locker® In-Ground Post Installation Instructions