Top 10 Board Backed Envelopes A4 20 UK – Envelopes

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1. SALTECH

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5 X A4 Board Back Manila Envelopes. "Please Do Not Bend" Written On Each Envelope. Size- 324mm x 229mm .Self Seal Secure Envelopes. 5 ENVELOPES

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SALTECH #ad - High quality strong self Seal adhesive strip 10mm wide, gives an extra security. Lightweight - Saves your money by reducing postage cost. High quality and steady envelopes which will keep your documents safe. Each envelope is printed "Please do no bend" in red. Self seal-simply remove the strip and press the flap down to seal. Pack of 5 envelopes.
BrandSALTECH #ad
ManufacturerSALTECH #ad
Height0.2
Length12.6
Width8.66
Part Number225RT

2. ARPAN

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Arpan 324mm x 229mm A4 C4 Manilla Hard Board Backed Envelopes Do Not Bend Pack of 125

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ARPAN #ad - Can apply sticky labels to write an address if required, Quick and Easy packaging. Gives a professional finish to your parcel. Lightweight - Saves your money by reducing postage cost. High quality strong self Seal adhesive strip 10mm wide, gives an extra security. 100% environment friendly as they made from recycled materials.
BrandARPAN #ad
ManufacturerARPAN #ad
Part NumberPM-C4-PK125
ModelPM-C4-PK125

3. Blake

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Pack of 125, Blake Purely Packaging C4 A4 324 x 229 mm Board Back Pocket Peel & Seal Envelopes 13935 Manilla

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Blake #ad - Strong peel & seal closure for ease of use, additional security and longer shelf life. Heavy duty board Back to protect certificates, photographs, prints and more. Printed please do not bend on the face for extra safety. Make a difference to your mail with these Purely Packaging Board Back envelopes by Blake.
BrandBlake #ad
ManufacturerBlake Envelopes #ad
Height18.5 cm (7.28 Inches)
Length32.5 cm (12.8 Inches)
Width24 cm (9.45 Inches)
Part Number13935
Model13935

4. iSOUL

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20Pcs A4 Envelopes Self-Seal iSOUL 324mm x 229mm A4 C4 Manilla Hard Board Backed Envelopes Do Not Bend Envelope

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iSOUL #ad - Peal & seal: simply remove the strip and press the flap down to seal. These are ideal for both professional and personal use. Be free from the further mess of Gum or any other adhesive since no moisture is needed.

In the front lower left-hand corner, it is Pre-printed with Words “Do Not Bend” which ensures to keep the document safe and flat. Environment friendly as they made from recycled materials. Includes: 20 x a4 c4 324mm x 229mm manilla Hard Board Backed Envelopes Do Not Bend Envelope. Multi purpose: our large letter a4 posting envelopes are great for mailing holiday cards, wage slips, pay slips, letters, announcements, greeting cards, photos, invitations, dinner money, business office home and personal use.
BrandiSOUL #ad
ManufactureriSOUL #ad
Height0.03 cm (0.01 Inches)
Length32.4 cm (12.76 Inches)
Width22.9 cm (9.02 Inches)
Part NumberIS-2020-ENVELOPES
ModelA4 ENVELOPES 20PCS

5. Triplast

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Perfect for Mailing, Posting & Storing Important Documents, Triplast 10 x A4 C4 Manilla Hard Board Back Envelopes 324 x 229mm, Cardboard Backed Please Do Not Bend Envelope with Peel & Seal Strip

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Triplast #ad - A mailing essential: these c4 rigid mailers are designed to contain unfolded A4 paper or A3 paper folded in half - they're perfect for posting & storing certificates, passports, artwork, photos, legal documents, currency, gift cards, ID cards, etc.

Save on packing & postage: a more cost-effective & waste-free alternative to all board envelopes, these light yet sturdy card backed envelopes are also cheaper to post. Eco-friendly: made from 100% recycled material, fully kerbside recyclable & biodegradable - these hard back envelopes are a plastic-free, sustainable & environmentally conscious packaging choice for office, school & home use. Quick, easy & cost by providing a strong & secure: built-in peel & seal strip reduces packing time & hassle-free seal while also offering extended shelf-life over self seal envelopes - just remove the strip & press the flap down to seal!.

You may write on them directly to eliminate the need for extra address labels. Please do not bend" is printed in large red font on the front to caution all handlers. Do not bend: 120gsm kraft paper front & 1000 micron board back construction offers all-round protection & rigidity to keep contents flat, crease-free & safe.
BrandTriplast #ad
ManufacturerTriplast #ad
Height0.08
Length9.02
Weight0.12
Width12.76
Part NumberA4 C4
ModelA4 C4
WarrantyGreat Britain

6. Blake

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Pack of 10, Blake Purely Packaging C4 324 x 229 x 25 mm 130 gsm Gusset Pocket Peel and Seal Envelopes 1991/10 PR Manilla

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Blake #ad - Model number: 1991/10 PR. Made from high quality paper. Peel and Seal. Useful for catalogues, books etc.
BrandBlake #ad
ManufacturerBlake Envelopes #ad
Height0.01
Length12.76
Width9.02
Part Number1991/10 PR
Model1991/10 PR

7. Triplast

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Triplast 20 x A5 C5 Manilla Hard Board Back Envelopes 229 x 162mm, Cardboard Backed Please Do Not Bend Envelope with Peel & Seal Strip, Perfect for Mailing, Posting & Storing Important Documents

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Triplast #ad - Please do not bend" is printed in large red font on the front to caution all handlers. Eco-friendly: made from 100% recycled material, fully kerbside recyclable & environmentally conscious packaging choice for office, school & biodegradable - these hard back envelopes are a plastic-free, sustainable & home use.

A mailing essential: these c5 rigid mailers are designed to contain unfolded A5 paper or A4 paper folded in half - they're perfect for posting & storing certificates, gift cards, passports, currency, artwork, photos, ID cards, legal documents, etc. Quick, easy & seal strip reduces packing time & hassle-free seal while also offering extended shelf-life over self seal envelopes - just remove the strip & secure: built-in peel & cost by providing a strong & press the flap down to seal!.

Save on packing & postage: a more cost-effective & waste-free alternative to all board envelopes, these light yet sturdy card backed envelopes are also cheaper to post. Do not bend: 120gsm kraft paper front & rigidity to keep contents flat, crease-free & 1000 micron board back construction offers all-round protection & safe. You may write on them directly to eliminate the need for extra address labels.
BrandTriplast #ad
ManufacturerTriplast #ad
Height0.08
Length6.38
Weight0.03 kg (0.06 Pounds)
Width9.02
Part NumberA5 C5
ModelA5 C5
WarrantyChina

8. Printaline

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10 Board Backed Envelope A4 / C4 Size 9"x12" Hard Back

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Printaline #ad - Fast and secure: self-sealing adhesive strip. Self-sealing flaps provide a secure and reliable seal. 10 board backed envelope a4 / c4 size 9"x12" hard back. The handling instruction, pleaSE DO NOT BEND is printed in red on every envelope. The envelopes are ideal for posting fragile documents, transparencies, photos, certificates. Other qty's and sizes in our storefront.
BrandPrintaline #ad
ManufacturerPrintaline #ad
Height0.01
Length12
Width9
Part Number2607475

9. Triplast

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Posting & Storing Important Documents, Triplast 10 x A5 C5 Manilla Hard Board Back Envelopes 229 x 162mm, Perfect for Mailing, Cardboard Backed Please Do Not Bend Envelope with Peel & Seal Strip

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Triplast #ad - Eco-friendly: made from 100% recycled material, fully kerbside recyclable & biodegradable - these hard back envelopes are a plastic-free, sustainable & environmentally conscious packaging choice for office, school & home use. Please do not bend" is printed in large red font on the front to caution all handlers.

Save on packing & postage: a more cost-effective & waste-free alternative to all board envelopes, these light yet sturdy card backed envelopes are also cheaper to post. Do not bend: 120gsm kraft paper front & rigidity to keep contents flat, crease-free & 1000 micron board back construction offers all-round protection & safe. A mailing essential: these c5 rigid mailers are designed to contain unfolded A5 paper or A4 paper folded in half - they're perfect for posting & storing certificates, photos, gift cards, currency, artwork, legal documents, ID cards, passports, etc.

You may write on them directly to eliminate the need for extra address labels. Quick, easy & hassle-free seal while also offering extended shelf-life over self seal envelopes - just remove the strip & SECURE: Built-in peel & cost by providing a strong & seal strip reduces packing time & press the flap down to seal!.
BrandTriplast #ad
ManufacturerTriplast #ad
Height0.08
Length6.38
Weight0.06
Width9.02
Part NumberA5 C5
ModelA5 C5
WarrantyChina

10. POSTMASTER

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Hardback, Postmaster Please Do Not Bend Envelopes A4, Peel Seal x 10 Pack

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POSTMASTER #ad - Postmaster - we manufacture millions of Envelopes for some of Britain's biggest Organisations as well as for thousands of small, home based businesses. Pefc-certified for sustainability - peFC is a European based Forest certification system, that allows small- and family forest owners to demonstrate their excellence in sustainable forest management.

Do not bend - written clearly on the Envelope to help ensure your mail gets couriered through the postal system without being folded or damaged. Designed to be sent using a single Large Letter 1st Class or 2nd Class Stamp max 100g. Hard board-backed protection - essential for Important Documents such as legal papers, certificates and for A4 sized material such as Posters or CVs to help prevent damage so your contents remain professional. C4 envelope - designed to take sheets of a4 paper unfolded.
BrandPOSTMASTER #ad
ManufacturerBong #ad
Height0.04
Length12.76
Width9.02
Part NumberRBL10643
ModelRBL10643