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Original Keystone Series Inner Deluxe Post Quad Multi-Unit Mailbox System (Mailboxes not included)

Original Keystone Series Inner Deluxe Post Quad Multi-Unit Mailbox System (Mailboxes not included)
Ordering Information
Item Number:KDD4
Availability:Usually ships in 1 to 3 business days
Warranty:1 Year Full Manufacturers Warranty
Returns:Return Policy
Size:77.5"H x 83.375"W x 8"D
Ship Weight:65 Lbs.
Shipping Cost:Free Shipping Today!!
List Price:$925.00
Sale Price:$739.94
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Includes 2 Posts, 2 Finials, 2 Cross Beams, 4 Curved Braces, 2 Post Cuffs, 1 Two-mount Beam)

Product Details

Original Keystone Series Inner Deluxe Post Quad Multi-Unit Mailbox System (Mailboxes not included)

The Gaines Multi Mount System
The Gaines Multi-Mount System is built and designed to serve the mailbox requirements of builders, developers and homeowners alike. It is perfectly suitable for either multi-residence or business uses. The Multi-Mount Package is not only fully functional, but aesthetically appealing as well. Personalize each package with a variety of finish and accent combinations to complete the overall look.Customize by adding any or all available options to the Multi Mount Package to meet your functional and decorative needs.

Package Includes the following:
  • 2 Posts
  • 2 Finials
  • 2 Cross Beams
  • 4 Curve Braces
  • 2 Post Cuffs
  • 1 Two Mount Beam

Metal and Finish
The Gaines Multi-Mount Package is constructed from durable A360 rust-proof cast aluminum. Extremely sturdy yet light-weight, cast aluminum is 100% rust-resistant. It is formed by pouring aluminum into a mold of the end product. During the manufacturing process, the aluminum goes under substantial amounts of pressure, which produces an extremely dense material that can withstand the harshest of conditions.

Gaines utilizes a five-stage, powder-coated paint process to ensure that their Multi-Mount Package maintains consistant quality as a durable product with a high-quality finish. Powder coating has ultraviolet ray (UV) inhibitors that protect the surfaces, making the finish resistant to chipping, scratching, fading, and wearing. Colors remain bright and vibrant for years to come. The Gaines Multi-Mount Package is available in these elegant finishes:

  • Almond
  • Classic black
  • Classic white
  • Metallic bronze
  • Metallic charcoal
  • Forest green

Mailbox Styles - (Not Included)

Original Keystone Mailbox: The Gaines Multi-Mount Package comes in two styles. The conventional styled mailbox features a door that matches the finish. It also has the customary red flag. For a more stylish look, an optional decorative door plaque with an embossed eagle and flag accents are available. These accents are crafted from solid brass and come in four different finishes: Polished Brass, Antique Bronze, Satin Nickel, or Verde Brass.

Signature Keystone Mailbox: The Signature Keystone mailbox features uniquely scripted and raised letters that exude elegance and sophistication. Constructed from solid brass, each letter casts a soft shadow across the mailbox door which adds depth and unmistakable character. The lettering is available in four different finishes: Polished Brass, Antique Bronze, Satin Nickel, or Verde Brass. Regular basic cleaning will keep the lettering looking new for years.

With six available package colors and the ability to combine accents, these mailboxes give you the option to choose from a total of 52 beautiful combinations.

Deluxe Multi Mount Post
The posts are manufactured from sturdy cast aluminum and are built to withstand the harshest of elements. They are finished to match the options you choose for your mailbox. The in-ground post system easily installs over sunken 4 x 4s for permanent and secured placement. Customize the Deluxe Multi Mount Posts with any number of Keystone options for a completely unique appearance.

Address Plaques
The stylish cast aluminum address plaques come in all six colors with a choice of three different vinyl letter colors: Gold, Bronze and Silver. The Plaques and Lettering are factory installed for all Multi Unit Mailbox Packages.


Curved Braces: The curved braces add a decorative accent to your Multi Mount System. They are made of durable, rust-proof cast aluminum and are finished in all six matching post colors. Not for use with optional newspaper holders.

Lockable Mailbox Inserts: The lockable insert option is offered for all Keystone Series Mailboxes. No more worries about mail and identity theft! The lock and key are constructed from high grade stainless steel. If you choose this option when you place your mailbox package order, the lockable insert will be factory installed

Deluxe Post Cuffs: The attractive Post Cuff adds the perfect finishing touch to the Multi Mount Posts. Quick and easy to install, the Post Cuffs are crafted from heavy duty, rust-proof cast aluminum and are finished in all six matching post colors.

Newspaper Holders: Add curbside utlimate functionality and convenience with the durable, all aluminum newspaper holder. Available in all six powder-coated finishes to match your Multi Mount Package. Not for use with optional curved braces.

  • Includes posts, finials, end caps, 1 three-mount beam, 2 curve braces & 2 post cuffs
  • Includes easy-to-use installation instructions and hardware
  • Available in almond, black, white, bronze, charcoal, and green
  • Door and Flag Accents available in polished brass, antique bronze, satin nickel, and verde brass
  • Lockable insert option available when you order mailboxes
  • Curved Brace option available (included in some packages)
  • Deluxe Post cuff option available (included in some packages)
  • Newspaper Holder option available (cannot be used with curved brace option)
  • Easy and durable door operation
  • Holds multiple days worth of mail for residences or businesses
  • Makes a great first impression, enhancing the curb appeal of properties
  • Personalized options include mailbox lettering in gold, silver or bronze
  • Address plaques availalbe in all colors.  Contain up to 5 characters each.
  • Mailbox Dimensions (each): 12 1/4"H x 10 3/8"W x 20 1/8"D
  • Multi Mount Post Dimensions: 77 1/2"H x 103 3/8"W x 8"D
  • Overall Multi Mount Package Dimensions: 77 1/2"H x 103 3/8"W x 20 1/8"D
  • Includes Manufacturers 1-year Warranty
  • Designed and built to last a lifetime

Related Downloads

PDF LOGORelated Products Catalog
PDF LOGOInstallation Instructions

Manufacturer Details

About Gaines Mailboxes

In 1991, Gaines Manufacturing recognized a need in the market for a line of beautifully designed and expertly manufactured mailboxes. To meet this consumer need, Gaines Manufacturing designed and brought to market the Classic Mailbox Collection. It became an overwhelming success and provided the impetus for future mailbox lines including The Keystone Series and The Wallmount Mailbox...

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