---
product_id: 42050005
title: "500 No. 8 Flip and Seal Double Window Security Check Envelopes - Designed for Quickbooks Printed Checks - Number 8 Size 3 5/8 Inch x 8 11/16 Inch"
brand: "blue summit supplies"
price: "$121.44"
currency: USD
in_stock: true
url: https://www.desertcart.ec/products/42050005-500-no-8-flip-and-seal-double-window-security-check
store_origin: EC
region: Ecuador
---

# 3.5" x 8.7" size Security tint design 500 count pack 500 No. 8 Flip and Seal Double Window Security Check Envelopes - Designed for Quickbooks Printed Checks - Number 8 Size 3 5/8 Inch x 8 11/16 Inch

**Brand:** blue summit supplies
**Price:** $121.44
**Availability:** ✅ In Stock

## Summary

> 📈 Secure Your Checks in Style!

## Quick Answers

- **What is this?** 500 No. 8 Flip and Seal Double Window Security Check Envelopes - Designed for Quickbooks Printed Checks - Number 8 Size 3 5/8 Inch x 8 11/16 Inch by blue summit supplies
- **How much does it cost?** $121.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/42050005-500-no-8-flip-and-seal-double-window-security-check)

## Best For

- blue summit supplies enthusiasts

## Why This Product

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

## Key Features

- • **Bulk Savings:** Stock up with 500 envelopes, perfect for busy professionals managing multiple transactions.
- • **Durable Quality:** Crafted from 24 LB white wove paper for a professional look that withstands transit.
- • **Double Window Design:** Showcases only addresses while keeping amounts and memos hidden for maximum privacy.
- • **Self-Seal Convenience:** Flip, flap, and seal with ease—no licking required for a secure closure.
- • **Perfect Fit for QuickBooks:** Designed to seamlessly accommodate QuickBooks printed checks, ensuring a hassle-free experience.

## Overview

The 500 No. 8 Flip and Seal Double Window Security Check Envelopes are expertly designed for QuickBooks printed checks, featuring a unique double window that ensures privacy while maintaining a professional appearance. With a self-seal closure and durable construction, these envelopes provide both convenience and security for your financial transactions.

## Description

500 No. 8 Flip and Seal Double Window Security Check Envelopes - Designed for Quickbooks Printed Checks - Number 8 Size 3 5/8 Inch x 8 11/16 Inch

## Features

- Perfectly fits QuickBooks Checks, or other computer printed checks: checks will slide in easier with a slightly wider design than a standard 8 5/8 envelope
- Checks amounts and memos will not be visible: Only addresses will show through our unique double window design with no need to change QuickBooks settings
- Provides complete check security: your checks will be hidden with our security tint design
- Just Flip Flap and Seal to create a strong lasting seal: Our self seal design is quick and easy and is guaranteed to stay sealed
- Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Blue Summit Supplies |
| Brand | Blue Summit Supplies |
| Item Weight | 1 pounds |
| Product Dimensions | 8 x 5 x 0.01 inches |
| Is Discontinued By Manufacturer | No |
| Color | White |
| Closure | Self-Seal |
| Shape | Rectangular |
| Material Type | Paper |
| Size | 500 Count |
| Manufacturer Part Number | BSS-92588-012 |

## Images

![500 No. 8 Flip and Seal Double Window Security Check Envelopes - Designed for Quickbooks Printed Checks - Number 8 Size 3 5/8 Inch x 8 11/16 Inch - Image 1](https://m.media-amazon.com/images/I/719vfSLraRL.jpg)

## Available Options

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

## Questions & Answers

**Q: Has the issue with the inferior qualiry paper, preforate sides, and size/ease of use been corrected? This is as seen in more recent reviews.**
A: We bought ours at the beginning of the year and have had no problems size, paper or adhesive. Will reorder when needed

**Q: How many envelopes in a pack?**
A: 500

**Q: what is the location of the top window? Measurements?**
A: the top window is 3/8  from top and 3/8 from the side.  It measures 3 1/2 inches wide and 7/8 inches wide.

**Q: Do these have the perforated backs/tops for easy opening?**
A: No, Easy open perforations.

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**Shop now:** [https://www.desertcart.ec/products/42050005-500-no-8-flip-and-seal-double-window-security-check](https://www.desertcart.ec/products/42050005-500-no-8-flip-and-seal-double-window-security-check)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-23*