---
product_id: 115284482
title: "Blake Purely Packaging C3 A3 450 x 324 mm Board Back Pocket Peel and Seal Envelopes (4200/50) Manilla - Pack of 50"
brand: "blake"
price: "HK$730"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/115284482-blake-purely-packaging-c3-a3-450-x-324-mm-board
store_origin: HK
region: Hong Kong
---

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

**Brand:** blake
**Price:** HK$730
**Availability:** ✅ In Stock

## Summary

> 📬 Send with confidence, protect with style.

## Quick Answers

- **What is this?** Blake Purely Packaging C3 A3 450 x 324 mm Board Back Pocket Peel and Seal Envelopes (4200/50) Manilla - Pack of 50 by blake
- **How much does it cost?** HK$730 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/115284482-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

- • **Effortless Security:** Strong peel & seal closure ensures your contents stay safe without the hassle of licking or taping.
- • **Bulk Pack Convenience:** 50 envelopes per pack—ideal for busy professionals who demand reliability and volume.
- • **Eco-Friendly Excellence:** Crafted from 100% recycled materials, these envelopes let you mail with a conscience.
- • **Clear 'Do Not Bend' Warning:** Printed front message adds an extra layer of care for your valuable certificates and photos.
- • **Rigid Board Back Protection:** Shield your important documents with heavy-duty board backing that prevents bending and damage.

## Overview

Blake Purely Packaging C3 Board Back Peel and Seal Envelopes combine robust protection with eco-conscious design. Sized at 450 x 324 mm, these manilla envelopes feature a rigid board back to safeguard bendable items like certificates and photos. The peel & seal closure offers secure, easy sealing, while the 'Please do not bend' print ensures careful handling. Sold in packs of 50, they are perfect for professionals who value durability, sustainability, and convenience.

## Description

Blake Purely Packaging C3 A3 450 x 324 mm Board Back Pocket Peel and Seal Envelopes (4200/50) Manilla - Pack of 50

## 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 |
| Item Weight | 5.49 pounds |
| Product Dimensions | 18.11 x 13.19 x 4.13 inches |
| Item model number | 4200/50 |
| Is Discontinued By Manufacturer | No |
| Color | Manilla |
| Closure | Self-Seal |
| Shape | Rectangular |
| Material Type | Faserplatte |
| Total Recycled Content Percentage | 100 |
| Number of Items | 50 |
| Size | C3 - Pack of 50 |
| Paper Finish | Uncoated |
| Manufacturer Part Number | 4200/50 |

## Product Details

- **Brand:** Blake
- **Color:** Manilla
- **Closure Type:** Self-Seal
- **Occasion:** Envelopes
- **Material:** Faserplatte

## Images

![Blake Purely Packaging C3 A3 450 x 324 mm Board Back Pocket Peel and Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 1](https://m.media-amazon.com/images/I/81S2chsbi1L.jpg)

## Available Options

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

## 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

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**Shop now:** [https://www.desertcart.hk/products/115284482-blake-purely-packaging-c3-a3-450-x-324-mm-board](https://www.desertcart.hk/products/115284482-blake-purely-packaging-c3-a3-450-x-324-mm-board)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-30*