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The HR300-1c is a rear access chuted mailbox for through-wall and double-glazed profiles. A popular choice with property developers, it provides a complete mail delivery system without taking up valuable floor space internally. Secured by Design compliant and EN13724 approved, this high-spec letter box has compact of dimensions of just 300 x 110 x 300mm (width, height, depth), yet it offers a generous total capacity of 9.9 litres. When specified for cavity wall installations, the HR300-1c is supplied with a solid aluminium panel. For glazed applications, it comes complete with a 24mm thermally-broken front plate for optimal support.

    The HR300-1c sloping postbox was made for banking. It can be linked with any number of units to create a bespoke mail box bank, with typical installations including anything from 6 to 60 letterboxes.

    The Post Boxes UK integrated service is a stress-free option for busy developers and management companies. It includes everything from planning and design drawings to delivery, and there are no limits to size. Please contact us for a personalised quote.


    The HR300-1c multiple-occupancy mailbox is suitable for double-glazed applications and cavity wall installations, and so it’s a versatile post box for buildings big and small.

    In the case of double-glazed profiles, a 24mm front panel is supplied to support the letterbox within the double glazed profile. This not only removes the need for internal supports, but it gives the mailbox a smart and professional finish. Such installations should only be performed by professional experienced glazing contractors.


    With hundreds of standard and non-standard RAL colours to choose from, the HR300-1c in-front out-back mailbox can be customised to complement any lobby or reception area.


    The lead-time for the HR300-1c space-saving letterbox is approximately 4 weeks. Single unit purchases may be delivered earlier, and bulk orders may take a little longer. We will provide you with up-to-date information on lead-times during the order process.

SKU: HR300-1c

  • Material
  • Support Legs
  • Numbering / Identificiation
  • Locking Options
  • Replacement Keys / Locks
  • Security
  • Model Range

Constructed in electro-galvanised steel, the HR300-1c communal postbox is robust and weather-resistant. Its one-piece front plate is offered in powder coated polyester or brushed stainless steel.

If you would like to add apartment numbers, identification codes, or nameplate inserts to the HR300-1c horizontal letterbox, please contact us. We offer a bespoke engraving service, and this communal residential mailbox can be specified with or without personalisation.

A standard non-mastered cam lock by Eurolock comes with every HR300-1c front entry rear retrieval letter box. Advanced locking systems are available upon request.

Post Boxes UK caters for developers, management companies, and shared facility managers alike. We can provide any number of replacement keys and locks for the HR300-1c multiple-occupancy postbox and offer discounts on bulk orders.

The HR300-1c dual access postbox complies with EN13724 and it is equipped with an anti-fishing device to its aperture. It also meets the guidelines published in the Secured by Design Homes Guide 2016.

Designed to work seamlessly with an intercom or CCTV video camera, this high-security mailbox can be purchased with an integrated intercom facility, which includes a speaker, buttons, and housing, or specified to accommodate your existing intercom or video camera panel. Please contact us to discuss your requirements.

The HR300-1c chuted rear access postbox is recommended for communal office blocks, multiple-occupancy apartments, and modern glazed buildings. It has a generous capacity, despite being low profile, and it can accept A4 size envelopes with ease. It’s integrated locking mechanism and anti-fishing aperture prevents unauthorised entry, and it is suitable for through-wall and double-glazed installations.

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