---
product_id: 283959108
title: "Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50"
brand: "blake"
price: "$59"
currency: NZD
in_stock: true
reviews_count: 5
url: https://www.desertcart.nz/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board
store_origin: NZ
region: New Zealand
---

# C3 size 450x324 mm - perfect fit Peel & Seal closure - secure & sleek 100% recycled fiberboard - eco-chic Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50

**Brand:** blake
**Price:** $59
**Availability:** ✅ In Stock

## Summary

> ♻️ Secure your important mail with style and sustainability!

## Quick Answers

- **What is this?** Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 by blake
- **How much does it cost?** $59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board)

## Best For

- blake enthusiasts

## Why This Product

- Trusted blake brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Friendly Edge:** Crafted from 100% recycled materials, aligning your brand with sustainability values.
- • **Clear Communication:** 'Please do not bend' printed boldly for extra care and professionalism.
- • **Effortless Security:** Strong peel & seal closure ensures quick, tamper-proof mailing every time.
- • **Bulk Pack Efficiency:** 50 envelopes per pack to keep your office stocked and your workflow uninterrupted.
- • **Rigid Protection, Zero Compromise:** Heavy-duty board back shields certificates, photos, and prints from bending or damage.

## Overview

Blake Purely Packaging C3 Board Back Peel & Seal Envelopes combine robust protection with eco-conscious design. Sized at 450 x 324 mm, these manilla envelopes feature a rigid fiberboard back to prevent bending of sensitive documents. The peel & seal closure offers quick, secure sealing, while the 'Please do not bend' print adds an extra layer of care. Sold in packs of 50, these 100% recycled envelopes are perfect for professionals who demand durability and sustainability in their office supplies.

## Description

Product Description               These 100% Recyclable Purely Packaging Board Back Envelopes By Blake Are Strong And Rigid, Made With High Quality Recycled Materials. The Mailers Safely Protect Bendable Items Such As Certificates, Photos And Prints, Whilst Their Recycled Content Helps To Make A Positive Contribution To The Environment.                  Set Contains:               50 envelopes

## Features

- Make a difference to your mail with these Purely Packaging Board Back envelopes by Blake
- Heavy Duty Board Back to protect certificates, photographs, prints and more
- Strong Peel & Seal closure for ease of use, additional security and longer shelf life
- Printed 'Please do not bend' on the face for extra safety
- Printed Do Not Bend on the front

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Blake Envelopes |
| Brand | Blake |
| Model number | 4200/50 |
| Product Dimensions | 46 x 33.5 x 10.5 cm; 2.49 kg |
| Color | Manilla |
| Closure | Self-Seal |
| Shape | Rectangular |
| Material Type | Fiberboard |
| Total Recycled Content Percentage | 100 |
| Number of Items | 1 |
| Size | C3 450 x 324 mm |
| Paper Finish | Uncoated |
| Manufacturer Part Number | 4200/50 |
| Item Weight | 2.49 Kilograms |

## Product Details

- **Brand:** Blake
- **Colour:** Manilla
- **Closure type:** Self-Seal
- **Occasion:** Envelopes
- **Material:** Fiberboard

## Images

![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 1](https://m.media-amazon.com/images/I/81S2chsbi1L.jpg)
![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 2](https://m.media-amazon.com/images/I/51tbdcM9eDL.jpg)
![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 3](https://m.media-amazon.com/images/I/91pcEkCy2CL.jpg)
![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 4](https://m.media-amazon.com/images/I/71kt-dr7YoL.jpg)
![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 5](https://m.media-amazon.com/images/I/61bgTwDlhuL.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    perfect for mailing cardz
  

*by S***N on Reviewed in the United States on 24 March 2024*

Just what i was looking for to safely mailing some sports cards  Size perfect  for the mailing labels!  Time  saver!

### ⭐⭐⭐⭐⭐ 







  
  
    Good pricing and quality for my purpose
  

*by J***I on Reviewed in Sweden on 10 September 2024*

Good pricing and quality for my purpose

### ⭐⭐⭐⭐⭐ 







  
  
    Perfect
  

*by J***J on Reviewed in the United Kingdom on 8 September 2024*

These envelopes were perfect size for sending A3 cinema posters. Great value for money for the amount. Seal is very secure and sticks down well. The thickness of the card is perfect for preventing any damage

## Frequently Bought Together

- Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50
- A3 Cello Bags - Crystal Clear & Good Thickness - for A3 Artwork/Photos (420MM x 306MM) - Makes Your Work Feel Pricey - 30mm Seal - 40Micron - Super Strong Seams
- House of Card & Paper Grey Kraft Board 1500micron 945gsm A3 Size 30 Sheets per Pack, HCP476

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nz/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board](https://www.desertcart.nz/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-14*