---
product_id: 447022140
title: "Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8\" x 8-7/8\", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181)"
brand: "columbian"
price: "23.15 OMR"
currency: OMR
in_stock: true
url: https://www.desertcart.com.om/products/447022140-columbian-9-security-envelopes-500-box-double-window-3-7
store_origin: OM
region: Oman
---

# 500 count Security tinted Double window design Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181)

**Brand:** columbian
**Price:** 23.15 OMR
**Availability:** ✅ In Stock

## Summary

> 📬 Seal the Deal with Style!

## Quick Answers

- **What is this?** Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181) by columbian
- **How much does it cost?** 23.15 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/447022140-columbian-9-security-envelopes-500-box-double-window-3-7)

## Best For

- columbian enthusiasts

## Why This Product

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

## Key Features

- • **Perfect Fit:** Designed to fit inside #10 envelopes for versatile mailing options.
- • **Privacy First:** Keep sensitive information hidden with our security tinted interior.
- • **Seamless Sealing:** Experience the effortless Redi-Seal closure—no moisture needed!
- • **Double Window Convenience:** Display only sender & receiver addresses for a clean, professional look.
- • **Professional Presentation:** Smooth, fold-free back panel ideal for printing logos and graphics.

## Overview

The Columbian #9 Security Envelopes come in a bulk pack of 500, featuring a double window design and a secure, self-sealing closure. Made from durable 24 lb white wove paper, these envelopes are perfect for sending invoices and sensitive documents while ensuring privacy and professionalism.

## Description

Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181)

## Features

- Get a jumbo box of 500 Columbian double window #9 envelopes (3-7/8" x 8-7/8") each with a security tinted interior and quick press-to-seal Redi-Seal closure
- Each white envelope is made from 24 lb white wove paper with an interior security tint pattern so you can't see what's inside; ideal for obscuring sensitive information & protecting critical documents
- #9 Envelopes fit inside #10 envelopes; side seam envelopes allow for a smooth, fold-free back panel for printing graphics, logos, and more
- Redi-Seal self seal mailing envelopes require no moisture; the unique double flap design allows you to simply raise the lower flap and press to seal closed
- Double window envelopes display just the sender & receiver addresses and keep sensitive information out of view; top window: 1-13/16" x 3-1/2"; bottom window: 1" x 4"; envelope: 3-7/8" x 8-7/8"

## Product Details

- **Brand:** Columbian
- **Color:** White
- **Closure Type:** Self-Seal
- **Material:** Paper
- **Number of Items:** 500

## Images

![Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181) - Image 1](https://m.media-amazon.com/images/I/71PEojsJXvL.jpg)
![Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181) - Image 2](https://m.media-amazon.com/images/I/61APG6TFYyL.jpg)
![Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181) - Image 3](https://m.media-amazon.com/images/I/61NoayiULJL.jpg)
![Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181) - Image 4](https://m.media-amazon.com/images/I/71D3lsTEfeL.jpg)
![Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181) - Image 5](https://m.media-amazon.com/images/I/7167TkU+mcL.jpg)

## Frequently Bought Together

- Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8" x 8-7/8", Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181)
- Columbian #8 5/8 Security Envelopes, 500/Box, Double Window, 3-5/8" x 8-5/8", Release & Seal Self Seal, SimplySafe Tamper Evident, White (COLO156)
- Amazon Basics Multipurpose Copy Printer Paper, 8.5" x 11", 20 lb, 10 Reams, 5000 Sheets, 92 Bright, White

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**Shop now:** [https://www.desertcart.com.om/products/447022140-columbian-9-security-envelopes-500-box-double-window-3-7](https://www.desertcart.com.om/products/447022140-columbian-9-security-envelopes-500-box-double-window-3-7)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-02-20*