Sigma High Capacity Lockable Parcel Box | Suitable for Gate, Fence & Through The Wall Mounting


  • Height: 800 mm
  • Width: 373 mm
  • Depth: 320mm ( 400 mm including Mail Chute)
  • Mail Chute Depth: 80 mm
  • Dimensions of Letter Slot: 30mm X 340mm
  • Dimensions of Parcel Box Slot: 100mm X 340mm
  • Maximum parcel dimensions: 80mm x 300mm x 400mm
  • Dimensions of Face plate: 280mm x 420mm including outer trim
  • Dimensions of Face plate: 238mm x 373mm without trim
  • Weight: 15kg
  • A4 Format Suitable
  • Material: Galvanised Steel
  • Secure parcel drop system
  • Thermal powder coated for enhanced rust and weather resistance
  • Colours: Dark Grey, Black
  • High capacity
  • 2 Years Warranty
Suitable for

Our parcel box is suitable for external use and has been designed for gate/fence mounting.

Tips & Instructions

Our current Dispatch and delivery terms can be viewed here


Our ever-popular Sigma Heavy Duty Parcel Box has had a re-design! In response to customer feedback and requests, we have added a new parcel delivery system to keep your parcels even more secure. There is a small adjustment to the dimensions to facilitate this but all the other features our customers love about this unique parcel box remain, making it a great choice if you are looking for a rear access parcel box.

The new delivery system means that there are no teeth but a straight forward secure parcel drop system giving extra security.

With a separate letter box and parcel box compartment, the Sigma Parcel Box is an easy and convenient way to receive parcels when you are not at home. For many of our customers, there has always been an issue of not having a secure place to store parcel deliveries when not at home, especially if you would rather keep the gates to your property closed. We aimed to eliminate this problem by designing and creating our very own parcel box.

Our outdoor parcel box is manufactured from high grade, anti-rust coated galvanised steel and accepts large parcels measuring up to 400mm length – 300mm width.

The design of the parcel box is based on our popular W3 rear access series. The box includes a standard letter flap opening as well as the newly designed parcel box opening. Integrated into the box is a new-improved security mechanism designed to deter mail theft of your post and parcels. The internal parcel shelf allows multiple packages to be delivered and stored safely while preventing anyone from reaching inside.

The colours available are Black RAL 9005 and Graphite RAL 7016.  We aim for the product images to be a fair representation of the colour available, however, due to the variance in the way colours are displayed on different devices they may appear slightly altered.