---
product_id: 3930029
title: "Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8\" x 8 7/8\", White, Box Of 500"
brand: "quality park"
price: "€ 134.95"
currency: EUR
in_stock: true
url: https://www.desertcart.de/products/3930029-quality-park-redi-seal-double-window-security-envelopes-9-3
store_origin: DE
region: Germany
---

# 3-7/8" x 8-7/8" 500/box Security tint Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500

**Brand:** quality park
**Price:** € 134.95
**Availability:** ✅ In Stock

## Summary

> 📬 Seal the Deal with Confidence!

## Quick Answers

- **What is this?** Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500 by quality park
- **How much does it cost?** € 134.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/3930029-quality-park-redi-seal-double-window-security-envelopes-9-3)

## Best For

- quality park enthusiasts

## Why This Product

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

## Key Features

- • **Bulk Convenience:** Stock up with 500 envelopes to meet all your mailing needs.
- • **Security Shielding:** Special pattern scrambles text for ultimate confidentiality.
- • **Privacy First Design:** Double windows keep your sensitive info under wraps.
- • **Seamless Self-Sealing:** Experience hassle-free sealing with Redi-Seal technology!
- • **Professional Presentation:** Crafted from 24 lb white wove paper for a polished look.

## Overview

Quality Park #9 Security Envelopes are designed for professionals who value privacy and efficiency. Each box contains 500 self-sealing envelopes, measuring 3-7/8 x 8-7/8 inches, perfect for QuickBooks invoices and statements. With a unique double window design and security tint, these envelopes ensure that sensitive information remains confidential while providing a sleek, professional appearance.

## Description

Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500

## Features

- Our big box of 500 #9 double window envelopes (3-7/8 in x 8-7/8 in) fit QuickBooks invoices & statements, not checks!; our self sealing envelopes have Redi-Seal press-to-seal closures & security tints
- Redi-Seal mailing envelopes have a unique double flap design that requires no moisture; just raise the lower flap and press for a no-fuss self seal envelope
- Double window envelopes show just the sender and receiver addresses; our business envelopes keep private info out of view; top window: 1-3/16" x 3-1/2"; bottom: 1" x 4"; envelope: 3-7/8" x 8-7/8"
- Security envelopes shield identification numbers & private data with a special security pattern to scramble the appearance of text; keeps envelope contents safe from prying eyes, even if held to light
- #9 Mailing envelopes measure 3-7/8" x 8-7/8" and tuck neatly into #10 envelopes as reply envelopes; made of 24 lb white wove paper with professional side seams; stock up on boxes of 500

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Quality Park |
| Brand | Shipping Supply |
| Item Weight | 5.6 pounds |
| Product Dimensions | 13.13 x 9.13 x 3.63 inches |
| Item model number | QUA24529 |
| Is Discontinued By Manufacturer | No |
| Color | White |
| Closure | Buckle |
| Shape | Rectangular |
| Material Type | Paper |
| Number of Items | 500 |
| Size | 3-7/8 x 8-7/8 Inches |
| Sheet Size | 3 7/8 x 8 7/8 |
| Paper Finish | Wove |
| Manufacturer Part Number | QUA24529 |

## Product Details

- **Brand:** Shipping Supply
- **Color:** White
- **Closure Type:** Buckle
- **Material:** Paper
- **Number of Items:** 500

## Images

![Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500 - Image 1](https://m.media-amazon.com/images/I/61QeMAawIHL.jpg)
![Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500 - Image 2](https://m.media-amazon.com/images/I/61maC066NZL.jpg)
![Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500 - Image 3](https://m.media-amazon.com/images/I/517Tvaj34XL.jpg)
![Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500 - Image 4](https://m.media-amazon.com/images/I/61UkvMOEeaL.jpg)
![Quality Park® Redi-Seal™ Double-Window Security Envelopes, #9, 3 7/8" x 8 7/8", White, Box Of 500 - Image 5](https://m.media-amazon.com/images/I/81CQVA-D2rL.jpg)

## Frequently Bought Together

- Quality Park #9 Security Envelopes, Double Window, Self Seal, Invoices/QuickBooks Statements, 3-7/8 x 8-7/8 Inches, 24 lb White, 500/Box (QUA24529)
- Quality Park #8 5/8 Security Envelopes, Double Window, Self Seal Envelopes for Invoices/Statements, 3-5/8" x 8-5/8", 24 lb White, 500/Box (QUA24539)
- Amazon Basics Multipurpose Copy Printer Paper, 8.5" x 11", 20 lb, 8 Reams, 4000 Sheets, 92 Bright, White

---

## 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.de/products/3930029-quality-park-redi-seal-double-window-security-envelopes-9-3](https://www.desertcart.de/products/3930029-quality-park-redi-seal-double-window-security-envelopes-9-3)

---

*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-23*