C3 Apartment Letterbox NZ | NZ-Made Architectural Letterboxes

The C3 Apartment Letterbox is a secure, NZ-made landscape letterbox designed for apartments, townhouses and multi-unit developments.
Manufactured from strong, corrosion-resistant GIX™ Next Generation Steel, the C3 includes our new and improved vandal-resistant security bar, making the door more difficult to force open while helping prevent hands from reaching inside.
For greater durability and a premium architectural appearance, we recommend Dulux textured powder-coat finishes such as Protexture® or Duralloy® Mannex®. These finishes offer excellent resistance to visible marks and scuffs while helping disguise fingerprints and everyday wear.
The C3 can be configured into custom horizontal or vertical banks and supplied with powder-coated or stainless-steel doors, locks and two keys, optional combination locks and laser-etched numbering.
Although it offers professional-grade materials, NZ manufacturing and enhanced security, the C3 is not the most expensive apartment letterbox available. It delivers excellent long-term value without the compromises commonly associated with cheap imported systems.
Dimensions: 152 mm high × 352 mm wide × 250 mm deep
Mail capacity: Accommodates A4 mail in landscape orientation
WHY CHOOSE THE C3 APARTMENT LETTERBOX?
Designed and manufactured in New Zealand
Made from GIX™ Next Generation Steel
Stainless steel options by request
New and improved vandal-resistant security bar
Landscape format accommodating A4 mail
Premium Dulux textured powder-coat finishes
Powder-coated or stainless-steel door options
Lock and two keys supplied as standard
Optional combination and project-specific locking systems
Custom horizontal or vertical banking configurations
Laser-etched apartment numbering available
Front access, with rear access available on request
Revit files and 3D design information available
Nationwide delivery and ongoing New Zealand support
Professional quality without being the most expensive option
NZ-MADE FOR NEW ZEALAND CONDITIONS
Nationwide delivery | Custom configurations | Revit files available
For more comprehensive information please scroll down.

APARTMENT LETTERBOX C3 | NZ-MADE ARCHITECTURAL LETTERBOX
The C3 Apartment Letterbox by Post Impressions is a secure, architectural landscape letterbox designed for New Zealand apartment buildings, townhouses and multi-unit developments.
Designed and manufactured in New Zealand, the C3 combines professional-grade materials, improved mail security and custom design flexibility in a compact landscape format. It is particularly well suited to projects where wall width is available but installation depth is limited.
The C3 is not a lightweight, mass-produced imported letterbox. It is manufactured as a long-term building component, with the strength and durability required for busy apartment entrances and shared residential areas.
Despite these benefits, the C3 is not the most expensive apartment letterbox available. It provides architects, developers, builders and body corporates with excellent long-term value by combining NZ manufacturing, robust materials, enhanced security and ongoing local support at a competitive price.

Apartment letterboxes are positioned in one of the busiest areas of a residential building. They are opened every day and may be exposed to accidental knocks, construction damage, attempted theft and demanding environmental conditions.
The C3 is designed and manufactured locally so the material, configuration, access, colour and finish can be tailored to the needs of each project.
This provides considerably more flexibility than a standard imported letterbox bank, where the building often has to be designed around predetermined sizes, materials and configurations.
Post Impressions has been supplying architectural products throughout New Zealand since 2003. Our local manufacturing and ongoing support provide greater confidence for architects, developers, builders, body corporates and property managers.
BUILT FROM GIX™ NEXT GENERATION STEEL
The C3 body is manufactured from GIX™ Next Generation Steel—a zinc, aluminium and magnesium coated steel selected for its strength, corrosion resistance and excellent powder-coat adhesion.
Benefits of GIX™ steel include:
Strong, rigid construction for high-use common areas
Excellent resistance to corrosion
Enhanced protection around exposed edges and scratches
Excellent adhesion for architectural powder-coated finishes
Long-term performance in New Zealand urban and coastal environments
GIX™ steel provides a professional-grade foundation for a letterbox system intended to remain part of the building for many years.
NEW AND IMPROVED VANDAL-RESISTANT SECURITY BAR
The C3 now includes our new and improved vandal-resistant security bar.
This internal barrier reinforces the most vulnerable area of the letterbox, making the door more difficult to force open. It also helps prevent hands from reaching inside the letterbox to remove mail.
The upgraded security bar provides additional protection against:
Mail theft
Door tampering
Forced entry
Unauthorised access through the mail opening
This additional protection is particularly important in publicly accessible apartment entrances, foyers and shared residential spaces.
PREMIUM DULUX TEXTURED POWDER-COAT FINISHES
Where the project specification allows, Post Impressions recommends premium Dulux textured powder-coat finishes, including Protexture® and Duralloy® Mannex®.
Compared with standard smooth powder coatings, textured architectural finishes provide several practical and visual advantages.
High Mar and Scuff Resistance
Textured finishes are designed to resist visible marking and scuffing that can occur during fabrication, transportation, construction and everyday use.
Visually Forgiving Surface
The fine textured finish helps disguise fingerprints, minor surface variations and light everyday wear more effectively than many smooth, flat or gloss finishes.
Premium Architectural Appearance
The tactile, low-sheen finish creates a modern architectural appearance that complements contemporary interiors, exterior façades and popular COLORSTEEL® colour palettes.
Warranty-Grade Options
Eligible Dulux powder-coat systems may be supported by project-specific colour and durability warranties when the appropriate product, substrate, pretreatment and accredited application requirements are met.
The correct powdercoat system depends on the building’s location, environmental exposure, substrate, selected colour and intended use. Post Impressions can help determine the appropriate finish for your project.
CUSTOM APARTMENT LETTERBOX CONFIGURATIONS
Every apartment development is different. C3 letterboxes can be arranged horizontally or vertically to suit:
The number of apartments
Available wall dimensions
Front or rear access requirements
Interior or exterior installation
Apartment numbering
Architectural colour schemes
Powder-coated or stainless-steel doors
New developments or replacement letterbox banks
Our locally manufactured system gives project teams greater flexibility than fixed-size imported letterbox banks.
C3 APARTMENT LETTERBOX SPECIFICATIONS
Model: C3 Landscape Apartment Letterbox
Dimensions: 152 mm high × 352 mm wide × 250 mm deep
Mail capacity: Accommodates A4 envelopes in landscape orientation
Body material: GIX™ Next Generation Steel
Door options: Powder-coated steel or stainless steel
Security: New and improved vandal-resistant security bar
Locking: Lock and two keys supplied as standard
Optional locking: Combination locks and project-specific systems available
Access: Front access, with rear access available on request
Configuration: Custom horizontal or vertical letterbox banks
Numbering: Laser-etched apartment numbering available
Finish: Premium Dulux powder coating in your selected architectural colour
Manufacture: Designed and manufactured in New Zealand
Delivery: Available nationwide
Long term value without the highest price.
The cheapest letterbox is rarely the most cost-effective choice over the life of an apartment building. Lightweight materials, inadequate security, limited replacement parts and unsuitable finishes can result in damage, maintenance issues and premature replacement.
At the same time, a professional architectural letterbox system does not need to be the most expensive option.
The C3 provides a strong balance of quality and price. Its NZ-made construction, GIX™ steel body, improved security, premium finishing options and ongoing local support deliver excellent value for both new developments and replacement projects.
DESIGNED FOR ARCHITECTS AND SPECIFIERS
The C3 provides architects with a locally manufactured apartment letterbox system that can be configured around the building rather than treated as an afterthought.
Revit files and 3D design information are available to assist with architectural specification, spatial planning and project coordination.
REQUEST A C3 APARTMENT LETTERBOX QUOTE
For an accurate quote, please provide:
Number of letterboxes required
Available wall dimensions
Front or rear access
Interior or exterior location
Preferred body and door finish
Powder-coat colour
Apartment numbering requirements
Project delivery address
Call 021 799 520 or email info@postimpressions.co.nz.
Nationwide delivery and custom configurations are available.
Architecturally refined. Secure by design. Made in New Zealand.