---
product_id: 37086617
title: "Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings"
brand: "blue summit supplies"
price: "S/.304"
currency: PEN
in_stock: true
category: "Blue Summit Supplies"
url: https://www.desertcart.pe/products/37086617-blue-summit-supplies-500-9-double-window-security-envelopes-self
store_origin: PE
region: Peru
---

# Peel & seal fast closure 3 7/8 x 8 7/8 in perfect fit Security tint for privacy Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings

**Brand:** blue summit supplies
**Price:** S/.304
**Availability:** ✅ In Stock

## Summary

> 📬 Seal the deal on secure, sleek invoicing!

## Quick Answers

- **What is this?** Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings by blue summit supplies
- **How much does it cost?** S/.304 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/37086617-blue-summit-supplies-500-9-double-window-security-envelopes-self)

## 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

- • **Generous 500-Count Supply:** Stay stocked and ready for high-volume invoicing without interruption.
- • **Confidentiality You Can Trust:** Security tint blocks prying eyes, safeguarding sensitive financial info in transit.
- • **Effortless Peel & Seal Closure:** Speed up your mailing workflow with quick, moisture-free sealing.
- • **Designed for QuickBooks Invoices:** Tailored dimensions and window placement streamline your accounting mail-outs.
- • **Precision Double Window Alignment:** No more label hassles—addresses perfectly displayed for seamless billing.

## Overview

Blue Summit Supplies' 500-count #9 double window security envelopes measure 3 7/8 x 8 7/8 inches, featuring a privacy tint and peel-and-seal closure. Designed specifically for QuickBooks invoices and confidential billing, these self-adhesive envelopes ensure accurate address display and protect sensitive information, making them an essential tool for efficient, professional business mailing.

## Description

desertcart.com : Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings : Office Products

## Features

- No. 9 Envelopes, Self Seal, Designed For QuickBooks Invoices – Businesses and accounting teams mailing invoices and statements use these #9 double window self seal envelopes designed to reveal and align return and recipient addresses for accurate billing without labels or manual addressing.
- Self Sealing No. 9 Double Window Envelopes with Fast Peel & Seal Closure – Offices and billing teams handling high-volume invoicing use these #9 self seal security envelopes with a peel-and-seal strip that creates a secure closure quickly without moisture, improving efficiency in accounts receivable workflows.
- Number 9 Double Window Envelopes with Privacy Tint – Businesses mailing financial documents use these two windowed #9 envelopes made from 24lb white paper with a printed security tint that helps reduce read-through and protect sensitive information during transit.
- Room For Statement Inserts – Offices, tax professionals, and nonprofits use these 2 window #9 envelopes measuring 3 7/8 x 8 7/8 inches, which support invoices plus additional pages such as inserts or return envelopes for structured mailing workflows.
- 500-Count Office Supply Pack – Small businesses, accounting teams, and administrative offices use this 500-count pack of #9 double window envelopes to maintain a dependable supply for recurring invoice runs and monthly statement processing.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01M5HR1N3 |
| Additional Features | Double Window, Peel and Seal, Security Tint, Self-Adhesive Closure |
| Best Sellers Rank | #43,323 in Office Products ( See Top 100 in Office Products ) #101 in Business Mailing Envelopes |
| Brand Name | Blue Summit Supplies |
| Closure Type | Self-Seal |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (613) |
| Item Dimensions L x W | 8.8"L x 3.8"W |
| Item Shape | Rectangular |
| Manufacturer | Blue Summit Supplies |
| Material Type | Paper |
| Number of Items | 1 |
| Occasion | Business Mail, Invoicing |
| Occasion Type | Business Mail, Invoices |
| Recommended Uses For Product | Security |
| Size | Number 9 |
| Style | Security |
| UPC | 865181000306 |
| Unit Count | 500 Count |

## Product Details

- **Brand:** Blue Summit Supplies
- **Closure Type:** Self-Seal
- **Color:** White
- **Material:** Paper
- **Occasion:** Business Mail, Invoicing

## Images

![Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings - Image 1](https://m.media-amazon.com/images/I/71y19OQM3TL.jpg)
![Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings - Image 2](https://m.media-amazon.com/images/I/81el1PGXvmL.jpg)
![Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings - Image 3](https://m.media-amazon.com/images/I/81Qo+htIGGL.jpg)
![Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings - Image 4](https://m.media-amazon.com/images/I/81Aw9CK4TtL.jpg)
![Blue Summit Supplies 500#9 Double Window Security Envelopes, Self Seal | 3 7/8 x 8 7/8 in, security tint, peel and seal, for QuickBooks invoices, statements, confidential billing mailings - Image 5](https://m.media-amazon.com/images/I/71ki4kyd+gL.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.pe/products/37086617-blue-summit-supplies-500-9-double-window-security-envelopes-self](https://www.desertcart.pe/products/37086617-blue-summit-supplies-500-9-double-window-security-envelopes-self)

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-08-16*