--- product_id: 292438964 title: "Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox" brand: "mail boss" price: "€ 211.86" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.be/products/292438964-mail-boss-7121-black-in-ground-mounting-post-43-x store_origin: BE region: Belgium --- # Durable powder-coated finish Includes 4 mounting bolts Heavy-duty 10- & 14-gauge steel Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox **Brand:** mail boss **Price:** € 211.86 **Availability:** ✅ In Stock ## Summary > 📬 Elevate your curb appeal with the ultimate mailbox post upgrade! ## Quick Answers - **What is this?** Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox by mail boss - **How much does it cost?** € 211.86 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/292438964-mail-boss-7121-black-in-ground-mounting-post-43-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 - • **Universal Compatibility:** Seamlessly fits all Mail Boss locking security mailboxes for ultimate protection. - • **Built to Last, Built to Secure:** Heavy-duty electrogalvanized steel ensures unmatched durability and rust resistance. - • **Perfect USPS Height Compliance:** 43-inch post designed for precise mailbox placement between 41"-45" USPS standards. - • **Easy Installation, Zero Guesswork:** Comes with 4 mounting bolts and clear instructions for a hassle-free setup. - • **Flawless Finish, Weatherproof Style:** Powder-coated surface resists fading and corrosion, keeping your mailbox post looking sharp year-round. ## Overview The Mail Boss 7121 In-Ground Mounting Post is a 43-inch heavy-duty, electrogalvanized steel post with a powder-coated finish designed for secure, weather-resistant mailbox installation. It meets USPS height requirements and includes mounting hardware, fitting all Mail Boss locking mailboxes for enhanced security and durability. ## 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 | |---------------|-------| | Asin | B000VYL1P8 | | Best Sellers Rank | #2 in Mailbox Posts | | Country Of Origin | China | | Date First Available | 9 August 2012 | | Is Discontinued By Manufacturer | No | | Item Model Number | 7121 | | Manufacturer | Mail Boss | | Product Dimensions | 109.22 x 10.16 x 10.16 cm; 6.35 kg | ## Images ![Mail Boss 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) ![Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox - Image 2](https://m.media-amazon.com/images/I/A1zFGjsbG2L.jpg) ![Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox - Image 3](https://m.media-amazon.com/images/I/91sjrS5eMvL.jpg) ![Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox - Image 4](https://m.media-amazon.com/images/I/71NZLkPDWiL.jpg) ![Mail Boss 7121, Black In-Ground Mounting Post, 43 x 4 x 4 inches, for Use with Mailbox - Image 5](https://m.media-amazon.com/images/I/811rLiYXqAL.jpg) ## Available Options This product comes in different **Color Name** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Montagepfosten *by on Reviewed in Germany 21 April 2026* Prima Vollpfosten :-) ### ⭐⭐⭐⭐⭐ Post installation *by on Reviewed in Canada 1 June 2023* Like how you can insert a 4 x 4 wooden post to help strengthen it ### ⭐⭐⭐⭐⭐ Very good upgrade to old wooden mailbox post. *by on Reviewed in the United States 17 May 2026* Durable, strong, well powdercoated/painted post. Easy to install, very secure, looks great, works well with mail boss mailbox. Average price. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/292438964-mail-boss-7121-black-in-ground-mounting-post-43-x](https://www.desertcart.be/products/292438964-mail-boss-7121-black-in-ground-mounting-post-43-x) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-10-19*