---
product_id: 12212754
title: "Top Flight Number 10 Boxed Security Envelopes, Strip and Seal Closure, 4 1/8 x 9 1/2 Inches, White, 45 Envelopes per Box (6900120)"
brand: "#10 security envelopes"
price: "£11.10"
currency: GBP
in_stock: true
reviews_count: 9
url: https://www.desertcart.co.uk/products/12212754-top-flight-number-10-boxed-security-envelopes-strip-and-seal
store_origin: GB
region: Great Britain
---

# 24 lb paper stock 4 1/8 x 9 1/2 in Security lining Top Flight Number 10 Boxed Security Envelopes, Strip and Seal Closure, 4 1/8 x 9 1/2 Inches, White, 45 Envelopes per Box (6900120)

**Brand:** #10 security envelopes
**Price:** £11.10
**Availability:** ✅ In Stock

## Summary

> 📬 Seal the Deal with Confidence!

## Quick Answers

- **What is this?** Top Flight Number 10 Boxed Security Envelopes, Strip and Seal Closure, 4 1/8 x 9 1/2 Inches, White, 45 Envelopes per Box (6900120) by #10 security envelopes
- **How much does it cost?** £11.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/12212754-top-flight-number-10-boxed-security-envelopes-strip-and-seal)

## Best For

- #10 security envelopes enthusiasts

## Why This Product

- Trusted #10 security envelopes brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Privacy First:** Equipped with a security lining to keep your contents confidential.
- • **Bulk Convenience:** Comes in a box of 45, perfect for all your mailing needs.
- • **Seamless Sealing:** Experience the ease of self-seal closure for quick, hassle-free mailing.
- • **Sturdy & Reliable:** Crafted from robust 24 lb paper stock, ensuring your documents stay protected.
- • **Professional Presentation:** Sleek white design that enhances your professional image.

## Overview

Top Flight Number 10 Boxed Security Envelopes offer a perfect blend of durability and security. Measuring 4 1/8 x 9 1/2 inches, these envelopes are made from sturdy 24 lb paper stock and feature a self-seal closure with a security lining, ensuring your documents remain confidential. Each box contains 45 envelopes, making them an ideal choice for professionals who value both quality and convenience.

## Description

Top FlightNumber 10 Boxed Security Envelopes, Strip and Seal Closure, 4 1/8 x 9 1/2 Inches, White, 45 Envelopes per Box (6900120)

## Features

- 4 1/8 x 9 1/2 Inches
- Sturdy 24 pound paper stock
- White envelopes with security lining
- Self-seal closure
- 45 per box

## Images

![Top Flight Number 10 Boxed Security Envelopes, Strip and Seal Closure, 4 1/8 x 9 1/2 Inches, White, 45 Envelopes per Box (6900120) - Image 1](https://m.media-amazon.com/images/I/61tdDPjRacL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐ 







  
  
    Envelopes
  

*by P***4 on Reviewed in the United States on May 1, 2023*

Standard, nothing special

### ⭐⭐⭐⭐⭐ 







  
  
    They work
  

*by P***O on Reviewed in the United States on March 18, 2022*

Does what they are supposed to do!

### ⭐⭐⭐⭐ 







  
  
    Self-Stick Envelope Security
  

*by H***P on Reviewed in the United States on August 15, 2016*

What are you looking for in a security envelope?  Security, right? This one is a nice medium weight, with the typical blue cross-hatch surface inside.  It also has a pleasant satiny feel.  And best of all, it seals by removing a thin paper strip across the inside of the flap, which really sticks the first time you press it down.  It appears to be the same type of sticky product that the post office now uses on stamps.  That is, with some diligence you can un-peel it and then stick it back again.  In an envelope that is a handy feature for those of us who occasionally forget to enclose something that was meant to go inside.  It also means that someone else could open the envelope and re-seal it, which could compromise the security.  For me, the convenience trumps the remote chance of tampering.  And un-peeling the flap would leave marks showing that it had been tampered with, so that is another protection...but I wanted you to be aware of that possibility.  All in all, I will order this product again.  Good value, good quality.

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**Shop now:** [https://www.desertcart.co.uk/products/12212754-top-flight-number-10-boxed-security-envelopes-strip-and-seal](https://www.desertcart.co.uk/products/12212754-top-flight-number-10-boxed-security-envelopes-strip-and-seal)

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*Product available on Desertcart Great Britain*
*Store origin: GB*
*Last updated: 2026-04-22*