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White cardboard envelopes with locking flaps

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50% OffClearance
From  £48.24  ex. VAT
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Up to 48 hours FREE delivery
  • 350 gsm micro-flute board with a white finish
  • Keeps products free from creasing during posting
  • Reinforced corners also provide extra protection
  • Expandable edges increase height by up to 40 mm
  • Sold in packs
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Eco-responsible product


Price ex. VAT per pack Up to
50% Off
1 +3 +5 +10 +
  PCB06C 440320125small parcel10048.2448.2448.2448.24
  PCB09C 670520270large parcel5059.0059.0059.0059.00
Detailed description

Expandable and with tamper evident locking flaps

Featuring tamper evident locking flaps, which once inserted cannot be opened without causing considerable damage to the cardboard envelope, these white, carton envelopes are ideal for safe posting. For extra security, why not seal the envelopes with one of our packaging tapes? Each mailer is manufactured from 350 gsm micro-flute corrugated board which helps maintain the structure and rigidity of the envelope and also has an attractive white finish.

This board keeps your products flat and free from creasing during posting and will protect from day to day wear and tear. Reinforced corners also provide extra protection for your products.

The expandable edges allow the cardboard envelope to increase in height by up to 40 mm, meaning that you can use these cardboard envelopes to post a variety of different products including DVDs, CDs, books, catalogues and calendars.

If you want to discuss your packaging requirements with one of our experts call 0800 542 44 28 today.

Sold in packs.

Materials These carton envelopes with tamper evident locking flaps are made from 350gsm micro-flute corrugated board with a clean white finish.

Environmental information 100% recyclable.

Delivery information Delivered sealed in cardboard boxes to protect from dust and dirt.


How to choose the correct size white cardboard envelope for your product:
When the cardboard envelope is expanded, please note that envelope decreases in opening and length measurements.
To use at minimum capacity: Subtract 20 mm from the opening and 10 mm from the length.
To use at maximum capacity: Subtract 60 mm from the opening and 30 mm from the length.