---
product_id: 292438964
title: "7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox"
brand: "mail boss"
price: "21583 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/292438964-7121-black-in-ground-mounting-post-43-x-4-x
store_origin: IS
region: Iceland
---

# Durable powder-coated finish Includes 4 mounting bolts & clear instructions Heavy-duty 10 & 14-gauge galvanized steel 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox

**Brand:** mail boss
**Price:** 21583 kr
**Availability:** ✅ In Stock

## Summary

> 📬 Elevate your curb appeal with the ultimate in-ground mailbox post — secure, sleek, and built to last!

## Quick Answers

- **What is this?** 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox by mail boss
- **How much does it cost?** 21583 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/292438964-7121-black-in-ground-mounting-post-43-x-4-x)

## Best For

- mail boss enthusiasts

## Why This Product

- Trusted mail boss brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Constructed from robust 10- and 14-gauge electrogalvanized steel for unmatched durability and rust resistance.
- • **Sleek & Secure:** Finished with a premium powder-coated black surface that resists weather and maintains a professional look.
- • **All-in-One Ready:** Comes with 4 mounting bolts and clear instructions, making setup quick and hassle-free for your Mail Boss locking mailbox.
- • **Versatile Installation:** Fits over a treated 4x4 wooden post for deep, reinforced in-ground mounting with rebar stakes for extra stability.
- • **Perfect USPS Compliance:** Designed to position your mailbox slot between 41"-45" above ground, meeting USPS standards effortlessly.

## Overview

The Mail Boss 7121 In-Ground Mounting Post is a 43-inch tall, heavy-duty galvanized steel post with a powder-coated black finish designed to securely mount Mail Boss locking mailboxes. Engineered for USPS compliance, it fits over a 4x4 wooden post for reinforced installation and includes all necessary mounting hardware for easy setup.

## Description

The In Ground Steel Mounting Post by Mail Boss is made of heavy-duty galvanized 10- and 14-gauge galvanized steel with a durable powder-coated finish. Use this 43″ in-ground post to mount any curbside Mail Boss locking mailbox. The In Ground Post should be buried approximately 12″ in ground in order for the incoming mail slot of the Mail Boss mailboxes to be within USPS specifications of 41″-45″ above the road side surface. This post will fit securely over a treated wooden 4″x4″ post for deep installations and reinforcement with rebar stakes.

## Features

- Post made of heavy-duty 10- and 14-gauge electrogalvanized steel
- Features durable powder-coated finish
- Can be used with a wooden post for deep in-ground installations
- Includes 4 mounting bolts and clear instructions
- Accepts all Mail Boss brand Locking Security Mailboxes

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Mail Boss |
| Part number | 7121 |
| Item Weight | 6.35 Kilograms |
| Product Dimensions | 109.22 x 10.16 x 10.16 cm; 6.35 kg |
| Item model number | 7121 |
| Color | Black |
| Style | In-Ground |
| Finish | Powder-Coated |
| Material | Galvanized Steel |
| Item Package Quantity | 1 |
| Included components | Electrical & Heating;Rough Electrical;arc-fault-circuit-breakers |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox - Image 1](https://m.media-amazon.com/images/I/71g+QiyxADL.jpg)

## Available Options

This product comes in different **Color Name** options.

## Frequently Bought Together

- Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox
- Mail Boss 7506 Mail Manager Curbside Locking Security Mailbox, Black,Large
- Mail Boss, Black 7155 Surface Mount Base Plate

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**Shop now:** [https://www.desertcart.is/products/292438964-7121-black-in-ground-mounting-post-43-x-4-x](https://www.desertcart.is/products/292438964-7121-black-in-ground-mounting-post-43-x-4-x)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-17*