Freestanding Mail Stand Enclosures with 1 to 7 door 4C Horizontal Mailbox Units from National Mailboxes provide the perfect solution for your stand-alone installation needs. These kits allow your 4C mailbox and Parcel Locker centers to be easily mounted indoors or outdoors! 4C mailboxes meet or exceed STD-4C requirements for new construction and major renovations. They are also ideal for private delivery applications. Learn More
For more product info contact the National Mailboxes Customer Support Center at 1-800-676-5161


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- Local USPS Approval Required
- Freestanding 4C Horizontal Mailboxes include a U.S.P.S. approved 4C horizontal mailbox unit and a matching freestanding enclosure - minor assembly required
- Provide a convenient means of installing 4C horizontal mailboxes in locations where a wall mounted application is not desired or available
- Ideal for apartments, commercial buildings and residential developments
- For indoor or outdoor use
- Constructed of heavy duty aluminum and stainless steel hardware
- Feature a durable powder coated finish available in aluminum, bronze, gold and sandstone
- Accessed from the front through 1 or 2 easy opening master door panels
- Doors include a heavy duty cam lock with a dust/rain shield and 3 keys
- U.S.P.S. standard 4C requires a minimum of 1 parcel locker for every 10 tenant compartments
- Available in configurations that are 1 door wide (single column) and 2 doors wide (double column)
- Parcel lockers must be a minimum of 15" H to meet the 1:10 ratio. Once this ratio has been met, additional smaller parcel lockers may also be added.
- Includes a compartment for outgoing mail collection and is labeled "Outgoing Mail"
- Outgoing mail compartment / carrier access door includes the U.S.P.S. master lock access door (lock installed by the U.S.P.S.) and cannot be used for mail distribution
- Outgoing mail compartment includes a weather protection hood
Product Line Options:
- Custom engraved placards
- Custom engraved doors - regular
- Custom engraved doors - black filled
- Replacement locks
- Additional keys
- Key blanks
- Tenant parcel locker lock
- Outgoing mail slot plug kit
Colors: Aluminum, Black, Bronze, and Sandstone (Freestanding Mail Stand Enclosure and 4C Horizontal Mailbox Unit must be the same color)












