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Brown cardboard envelopes with locking flaps

From  £36.20 ex. VAT 36.2

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In stock
  • 350 gsm micro-flute corrugated board
  • Keeps items free from creasing during posting
  • Reinforced corners also provide extra protection
  • Expandable edges increase height up to 40 mm
  • Sold in packs
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Femmes et environnement - Product MEA - £1 pack
internal height mm
internal opening mm
weight g
mail format UK
pack quantity
£ per packQuantity  
10% off15% off20% off
1 +3 +5 +10 +
25036078small parcel100 54.0541.99 is 20% off
520670278large parcel50 92.6971.99 is 20% off
20025046large letter / small parcel100 46.65 40.77 38.50 36.20
23033067large letter / small parcel100 49.20 42.99 40.60 38.20
320440119small parcel100 76.90 67.20 65.35 59.75
362462141medium parcel100 99.90 89.90 82.40 77.59
430530185medium parcel100 123.59 111.20 105.05 95.99
450590216medium parcel50 72.09 64.87 59.49 55.99
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Detailed description

Expandable and tamper evident for secure mailing

These brown, carton envelopes feature tamper evident locking flaps, which once inserted cannot be opened without causing considerable damage to the cardboard envelope. For extra security, double 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.

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, and get next day delivery.

Sold in packs.

Quantity Available in packs of 50 or 100 depending on the size of the envelope. Please see our discounts for 3 or more packs if you want to order in bulk.

Size and shape options These carton envelopes with locking flaps start at 200x250mm and go up to 450x700mm (internal opening x height).

Materials Rajapack’s carton envelopes are made from 350gsm micro-flute corrugated board.

Environmental information 100% recyclable.

Delivery information Delivered in packs of 50 or 100.
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How to choose the correct size brown 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.