--- product_id: 228694105 title: "ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL" brand: "architectural mailboxes" price: "£93.53" currency: GBP in_stock: true reviews_count: 5 category: "Architectural Mailboxes" url: https://www.desertcart.co.uk/products/228694105-architectural-mailboxes-950020b-10-centennial-black-mailbox-post-mount-xl store_origin: GB region: Great Britain --- # 2176 cu in capacity Magnetic door closure Powder-coated corrosion resistance ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL **Brand:** architectural mailboxes **Price:** £93.53 **Availability:** ✅ In Stock ## Summary > 📬 Elevate your curb appeal with the mailbox that means business. ## Quick Answers - **What is this?** ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL by architectural mailboxes - **How much does it cost?** £93.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/228694105-architectural-mailboxes-950020b-10-centennial-black-mailbox-post-mount-xl) ## Best For - architectural mailboxes enthusiasts ## Why This Product - Trusted architectural mailboxes brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Heavy gauge galvanized steel with stainless steel pins and powder coating for all-weather durability. - • **Secure & Sleek Closure:** Magnetic door keeps your mail safe and the design clean without bulky locks. - • **Effortless Installation:** Predrilled mounting holes fit existing posts or upgrade with Architectural Mailboxes adapter plate. - • **USPS Approved & Stylish:** First mailbox designed to meet USPS Standard 7C, blending modern size with timeless aesthetics. - • **Parcel-Ready XL Capacity:** Fits USPS Priority Large Flat Rate boxes plus extra mail—never miss a delivery again. ## Overview The ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount XL is a USPS-approved, oversized mailbox designed to accommodate large parcels and daily mail with a 2176 cubic inch capacity. Crafted from heavy gauge galvanized steel with stainless steel door pins and a powder-coated finish, it offers superior corrosion resistance and durability. Featuring a sleek magnetic door closure and predrilled mounting holes, it combines functionality with modern design, making it the perfect upgrade for professionals who value security, style, and convenience. ## Description The Centennial Mailbox by Architectural Mailboxes is the first design to receive United States Postal Service approval against the new USPS Standard 7C regulation, released in late 2015. Named Centennial, it represents the next generation of mailbox size, since the last traditional size was introduced over 100 years ago in 1915. Meeting the needs of today's consumer, its ample mailbox compartment is designed to receive not only mail and magazines but multiple parcels. This means no more missed deliveries or parcels left out on the porch exposed to weather and thieves. Made with quality construction and heavy gauge materials complete with a die cast aluminum handle and rigid, powder coated steel flag. This attractive design combines aesthetics and functionality servicing all your mail and parcel needs. Review: This box is no joke. It’s way bigger than your standard mailbox. It’s sturdy and classy and doesn’t look oversized when driving by. It perfectly fits lots of mail and is very solid. I don’t recommend attaching it to a standard wood post. We fancied ours up with some nice stone and it looks amazing! Review: Very happy with the mailbox. It’s packaged very well so no damage upon receiving . Ordered two prior to this one from another company both were damaged when I got them. It’s plenty large. I don’t think you would need anything larger. ## Features - Larger inner compartment can accept a USPS priority mail large flat rate box 12 in. x 12 in. x 5.5 in. and still has room for additional mail and parcels - Heavy gauge galvanized steel body equipped with stainless steel door pins then fully powder coated for corrosion resistance - Sleek magnetic door closure provides reliability all while keeping door firmly closed - Predrilled 4 in. x 10 in. hole pattern in floor allows for mounting to existing post (installation hardware not included) - Order Architectural Mailboxes adapter plate 7540B for 4 x 4 wood post installation - Overall dimensions: 14 in. W x 12 in. H x 18.3 in. D - Approved by the US postmaster general - Works with Architectural Mailboxes post models 5526, 5525, 7516, and 7507 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B078H74L7T | | Best Sellers Rank | 975,606 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Multi-Family Letterboxes | | Brand | ARCHITECTURAL MAILBOXES | | Capacity | 2176 Cubic Inches | | Colour | Black | | Customer Reviews | 4.8 4.8 out of 5 stars (1,320) | | Date First Available | 19 Dec. 2017 | | Item Weight | 5.99 kg | | Material | Metal | | Model Number | 950020B-10 | | Product Dimensions | 46.61 x 35.99 x 30.3 cm; 5.99 kg | ## Product Details - **Brand:** ARCHITECTURAL MAILBOXES - **Colour:** Black - **Included security features:** No additional security features - **Material:** Metal - **Mounting type:** Post Mount ## Images ![ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL - Image 1](https://m.media-amazon.com/images/I/31idmg2eHCL.jpg) ![ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL - Image 2](https://m.media-amazon.com/images/I/41JutsF6XvL.jpg) ![ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL - Image 3](https://m.media-amazon.com/images/I/41N0fYE0RgL.jpg) ![ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL - Image 4](https://m.media-amazon.com/images/I/41OgCo5VDuL.jpg) ![ARCHITECTURAL MAILBOXES 950020B-10 Centennial Black Mailbox Post Mount, XL - Image 5](https://m.media-amazon.com/images/I/41k6tIK-e9L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by H***H on 29 July 2022* This box is no joke. It’s way bigger than your standard mailbox. It’s sturdy and classy and doesn’t look oversized when driving by. It perfectly fits lots of mail and is very solid. I don’t recommend attaching it to a standard wood post. We fancied ours up with some nice stone and it looks amazing! ### ⭐⭐⭐⭐⭐ Review *by K***N on 26 October 2023* Very happy with the mailbox. It’s packaged very well so no damage upon receiving . Ordered two prior to this one from another company both were damaged when I got them. It’s plenty large. I don’t think you would need anything larger. ### ⭐⭐⭐⭐⭐ Review *by N***L on 4 November 2025* Magnifique boîte au lettres Quand même assez solide et facile d'installation Beaucoup d'espace pour les colis Porte aimanté qui empêche l'ouverture durant les vents fort....j'aime bien Je recommande !! ## Frequently Bought Together - Architectural Mailboxes 950020B-10 Centennial Postmount Mailbox, XL, Black - Architectural Mailboxes 7516B-10 Pacifica In-Ground Steel Mailbox Post, Alloy Steel, One Size, Black - Reflective Mailbox Numbers Sticker Decal Die Cut Classic Style Vinyl Waterproof Number Self Adhesive 5 Sets (3" x 3 set, 4" x 2 set) for Signs, Door, Cars, Trucks, Home, Business, Address Number --- ## 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.co.uk/products/228694105-architectural-mailboxes-950020b-10-centennial-black-mailbox-post-mount-xl](https://www.desertcart.co.uk/products/228694105-architectural-mailboxes-950020b-10-centennial-black-mailbox-post-mount-xl) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-23*