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Internet # 300118181

Model # 7900-7B-SR-10

Store SKU # 1002094381

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Boulder Black, Large, Steel, Post Mount Mailbox with Silver Handle and Flag

$49.93
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  • Durable, rust-resistant galvanized steel construction
  • Reinforced ridges offer extra strength
  • Large capacity for high volume deliveries and medium packages
  • View More Details

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Product Details

About This Product

The Boulder is a bold take on the classic metal mailbox, finished in a sleek black powder coat that gives any home a polished, modern edge. With its clean lines and cast aluminum pull, this post mounted mailbox blends modern style with everyday durability. Fully powder coated inside and out, it's built to handle the elements - making it a smart pick for mailboxes for outside that need to last. A magnetic latch keeps the door securely closed, and it's USPS approved for daily delivery. Sized to fit your needs, this large mailbox is built for flexibility, making it a great fit for everything from curbside mailbox setups to stylish mailboxes for outside the home. Whether you're upgrading your outdoor mailbox or want a refined curbside upgrade, the Boulder delivers durability, function, and a sharp, standout look.

Highlights

  • Made with galvanized steel to support performance through rain, snow, and sun
  • Tough powder-coat finish, adding an extra layer of protection to this curbside mailbox
  • Large mailbox for outside offers plenty of room for mail, plus multiple packages without looking bulky at your curbside
  • Mailbox is USPS approved as required for all curbside delivery by U.S. Mail carriers for smooth, uninterrupted service
  • Fully assembled and ready to mount; Note mounting hardware comes with all Architectural Mailboxes compatible posts, not the mail box
  • Made to mount effortlessly on all Architectural Mailboxes posts marked with letter F
  • Secure magnetic closure keeps mail box door tightly shut to protect your curbside mailbox deliveries from wind and rain
  • Embossed area on the outside mailbox door makes adding house numbers simple and stylish for quick identification
  • Thoughtfully engineered with a focus on durability, function, and style
  • Works with Architectural Mailboxes post models 5515, 5525, 5526, 6215, 7507, 7510, 7511 and 7516
  • Hardware and mounting bracket may be required to mount to posts not manufactured by Architectural Mailboxes (not included)
  • Order Architectural Mailboxes adapter plate 7540B for 4 x 4 wood post installation
  • Approved by the US Postmaster General
  • Limited lifetime structural warranty
  • 100% satisfaction guaranteed
  • Capacity: large
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 300118181

Model # 7900-7B-SR-10

Store SKU # 1002094381

Specifications

Dimensions: H 10.6 in, W 8.7 in, D 20.7 in

Dimensions

Assembled Depth (in.)

20.7 in

Assembled Height (in.)

10.6 in

Assembled Width (in.)

8.7 in

Details

Access Type

Front Only

Assembly Required

Yes

Color

Black

Color Family

Blacks

Features

Outgoing Mail Indicator

Hardware Color Family

Black

Hub Required

No hub connection available

Included

Mailbox

Mailbox Capacity (cu. in.)

1277

Mailbox Size

Large

Mailbox Style

T2

Material

Galvanized Steel

Material

Galvanized Steel (N/A%)

Mount Type

Post Mount

Product Weight (lb.)

5.2 lb

Returnable

90-Day

Security

Non-Locking

Warranty / Certifications

Manufacturer Warranty

3 Year

U.S. Postmaster General Approved

Yes

Questions & Answers

Does the magnet keep the door closed in wind/snow/rain weather?
ByJul 30, 2026
1 Answer | 
Answer This Question

Thank you for your interest in our products. The magnetic latch keeps the door securely closed.

By|Jul 30, 2026


    Size?
    ByApr 15, 2026
    1 Answer | 
    Answer This Question

    Thank you for your interest in our products. The dimensions of the Boulder mailbox are 10.6" H x 8.7" W x 20.7" D.

    By|Apr 16, 2026


      What is the correct metal post to buy that will attach to this mailbox? Also what is the correct 4x4 adapter if we decide to attach to a wood post? Thank you
      ByNov 11, 2024
      1 Answer | 
      Answer This Question

      7516B-10, 7517B-10 are compatible posts. The universal mounting plate for a 4x4 wood post is #UMBS0B06AM

      By|Nov 15, 2024


        Is the front handle plastic or metal?
        ByOct 5, 2024
        1 Answer | 
        Answer This Question

        The handle is cast aluminum

        By|Oct 24, 2024


          Will this mailbox work with a Polymer post??
          ByMay 7, 2023
          2 Answers | 
          Answer This Question

          It should as long as the mounting holes are the same as what is predrilled on the floor of the mailbox.

          By|Aug 17, 2023

            It should as long as the mounting holes are the same as what is predrilled on the floor of the mailbox.

            By|May 8, 2023


              How much does the large mailbox weigh?
              ByOct 9, 2022
              1 Answer | 
              Answer This Question

              Obviously I didn’t weigh it when I installed it, but I would estimate 2-3 lbs.  It’s been holding up good and still looks brand new. 

              By|Oct 11, 2022


                Does it have a magnetic closure? We get a lot of wind.
                ByOct 22, 2021
                2 Answers | 
                Answer This Question

                Yes it does have a magnet in the closure.

                By|Apr 3, 2022

                  (1)

                  I absolutely love my Red mailbox. It’s a gorgeous red tone and perfectly matches my front door

                  By|May 7, 2023


                    What is recommendation for ordering enduing street number and street name in white on this mailbox.
                    BySep 23, 2020
                    2 Answers | 
                    Answer This Question

                    Eye-catching red mailbox large enough to hold a shoe box sized package

                    By|May 15, 2021

                      (1)

                      Hello, there are many options available to you for custom lettering, which you can have done locally by a small business who can create custom vinyl lettering or you can order each character and digit separately to spell out your street number and name - we recommend using 2-3 inch numbers and letters. Thanks for reaching out!

                      By|Sep 23, 2020


                        Viewing 1-8 of 11

                        Customer Reviews

                        4.3 out of 5

                        • 4.3 out of 197 reviews
                        • 80% recommend this product
                        Filter by:
                        Showing 1-10 of 197 reviews
                        Built in the dark!
                        Came nicely packaged and safe. The bottom plate was not installed correctly and is that such an angle that is visually unappealing. The flag was installed crooked, and there were several dents on the inside and out. I did reach out to HD customer service and they told me that I had 2 options. Return the item and re-order it which would take over 2 weeks or a 10% refund. So my options are have no mailbox for 2 weeks, or a $5 refund on an item that had too many problems to mention!
                        by
                          1 found this review helpful
                          Avoid Red
                          The red fades drastically. My mailbox is in the open and faces all the weather elements. After a year the color was more like pink (picture included). The mailbox itself is really nice quality and sturdy. The paint used is not of great quality at all. I don’t recommend this in red.
                          by
                            1 found this review helpful
                            Metal dents easily
                            Overall looks really nice. Metal can be dented easily so be careful. Read the other reviews about the color fading so we applied a thin layer of car wax. We just put it up a couple weeks ago so time will tell if it fades. Also the latch/magnet is a bit flimsy.
                            by
                            • Verified Purchase
                            Perfect size for mail as well as packages.
                            [This review was collected as part of a promotion.] I absolutely love this mailbox, not only is it stylish it is big enough to hold some of this small packages that arrive, there's plenty of room inside this mailbox. I thought it would be more difficult to install on my existing mount, but it was not problem at all. I love the little handle on the center of the lid to open the mailbox and the flag is easy to pull up and down. I'm sure that mail carrier likes it there's plenty of room for them to stash everything instead of having to run up to the door and drop it off!
                            by
                              • Recommended
                              Nice looking mailbox
                              [This review was collected as part of a promotion.] This mailbox is really easy to install. The box is made out of a sturdy material but has a finish on it that makes it look at little rough and the color is a matte look. It is really a nice looking mailbox. The flag is easy to raise and lower but is not really thick so you have to be careful raising it and lowering it. The mailbox size is a good one and holds up to a small package. The handle across the front is a nice size to open and close the mailbox. The swing down door helps to be able to put those packages inside. Overall it is an elegantly looking mailbox that helps the aesthetics of the building.
                              by
                                • Recommended
                                Will Hold All the Mail
                                [This review was collected as part of a promotion.] This mailbox is a beauty, and it has plenty of room for most daily deliveries, including packages. The previous box at our home was much smaller, and many times the postal driver would stuff packages in so that they were hard to get out, and the flag would break off. Architectural Mailboxes built a gorgeous mailbox with plenty of room. The metal mailbox has a "bronzish" color with a background of black, and the lighter-colored flag is sturdy. It should have no problems with the door not staying closed due to the magnet at the top. In order to use the existing mailbox, post I did have to use a block of wood to attach the mailbox.
                                by
                                  • Recommended
                                  Fading Glory
                                  Shipping was handled well and timely (on time). The color was the most alluring...shiny, bright red metal box. However, after 7-8 months, it is fading. However, it serves its purpose.
                                  by
                                    • Recommended
                                    Mailbox was delivered on time and was as expected. ...
                                    Mailbox was delivered on time and was as expected. This was a good option for a more modern look and it also is able to hold small packages. Recommend buying the black base too as easy to install as it includes the necessary hardware.
                                    by
                                    • Verified Purchase
                                    Very happy with this purchase! It was a bit bigger than I expected but not complaining. I ordered...
                                    Very happy with this purchase! It was a bit bigger than I expected but not complaining. I ordered the 4x4 post adapter with the mailbox which made installation a breeze. I also added a coat of car wax to preserve the red color here in the hot Florida sun. Others have complained about the hinge connection not being metal but I have not had a problem with mine. My mailman is very happy now.
                                    by
                                      • Recommended
                                      This is a very nice, large metal mailbox. The color is very bold and here in Maine, that helps th...
                                      This is a very nice, large metal mailbox. The color is very bold and here in Maine, that helps the snow plows see it when plowing the snow off the roads. The front has a nice firm handle attached at two points. The flag is also metal and moves easily. I mounted mine with the help of a short length of 2x8. I cut the wood to length and my plan was to screw that to the mailbox holder and then screw the mailbox on the wood through the holes provided along each long side. The problem with that plan was that the neighbor's mailbox is adjacent, on the same mailbox stand preventing access to one side to screw it down. So I changed my plan to fasten the mailbox onto the 2x8 first, then screw it to the platform from below. That worked fine but then I found the wood I used was too long and prevent the door from opening! So I had to undo it all and cut the wood shorter and try again. The instruction sheet did in fact mention one should check the clearance of the hinge! It was a quick mounting solution that is solid. There is a mounting plate that is sold separately. The inside of the base is 18½” long and 7¾” wide. The wood section below should be about 17” long. I applied some big yellow numbers which produced an excellent contrast with the red. Great looking mailbox, and it looks durable too.
                                      by
                                      • Recommended
                                      Showing 1-10 of 197 reviews

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                                      Product Snapshot

                                      Great for homeowners looking for a modern design, making mail retrieval easier and more efficient.
                                      Great for homeowners looking for a durable mailbox, making mail retrieval easier and more efficient.
                                      Ideal for homeowners seeking a durable, large capacity mailbox with a classic design. Powder-coated finish resists rust and weather damage.
                                      Ideal for secure mail and parcel delivery with dual-access doors and weather-resistant galvanized steel.

                                      Capacity

                                      Large
                                      1277 cu. in.
                                      1475 cu. in.
                                      Large, 1534 cu. in.

                                      Dimensions

                                      8.7 in. W x 10.6 in. H x 20.7 in. D
                                      8.9 in. W x 10.9 in. H x 20.6 in. D
                                      H 11.04 in. x W 9.49 in. x D 22.92 in.
                                      11.3 in. W x 11.5 in. H x 20 in. D

                                      Security Features

                                      Weather Resistance

                                      Material

                                      Galvanized Steel
                                      Galvanized Steel
                                      Galvanized Steel, Heavy-duty molded plastic door
                                      Galvanized Steel