--- product_id: 37086617 title: "500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack" brand: "blue summit supplies" price: "MX$1841" currency: MXN in_stock: true reviews_count: 11 category: "Blue Summit Supplies" url: https://www.desertcart.mx/products/37086617-500-blue-summit-9-double-window-security-envelopes-self-seal store_origin: MX region: Mexico --- # Peel & seal fast closure 9-3/8" x 8-7/8" perfect fit Dark privacy tint for security 500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack **Brand:** blue summit supplies **Price:** MX$1841 **Availability:** βœ… In Stock ## Summary > πŸ“¬ Seal your success with style and security! ## Quick Answers - **What is this?** 500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack by blue summit supplies - **How much does it cost?** MX$1841 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/37086617-500-blue-summit-9-double-window-security-envelopes-self-seal) ## 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 - β€’ **Bulk Efficiency:** 500-pack supply designed for high-volume mailings, ideal for busy professionals and nonprofits. - β€’ **Effortless Sealing:** Self-adhesive peel & seal closure saves timeβ€”no licking, no tape, just instant secure sealing. - β€’ **Privacy-First Security:** Dark security tint ensures sensitive billing info stays hidden, even with dual windows. - β€’ **Tailored for QuickBooks:** Double window design aligns perfectly with QuickBooks invoices for seamless sender & return address visibility. - β€’ **Professional Presentation:** Durable 24 LB white wove paper maintains a crisp, polished look throughout transit. ## Overview The Blue Summit #9 Double Window Security Envelopes come in a 500-pack, sized 3 7/8" x 8 7/8", designed specifically for QuickBooks invoices and business statements. Featuring a unique double window layout, dark privacy tint, and a peel-and-seal closure, these envelopes combine professional appearance with enhanced security and time-saving convenience for high-volume business mailing needs. ## Description desertcart.com : 500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack : Office Products Review: Professional look and great time saver - This is a great product and at a very reasonable price. As a small membership-based nonprofit we send out an acknowledgement for every donation received. Having a quality #9 double window self seal security envelope has eliminated the need for hand addressing or generating mailing labels. Our logo and up to 4-line addressing fit the windows perfectly. The benefit of all the time saved and the professional look easily justifies the cost of the product. Review: Always goid - Repeat irder ## Features - Our Invoice Envelopes Self Seal Perfectly fits QuickBooks Invoices and business billing statements: sender and return address will be visible on your QuickBooks invoices and monthly bills through our unique two window design. - Our Envelopes for Quickbooks Invoices enable quick and easy stuffing of our wide envelopes with several invoices or business statements - Provides complete business mail security even with 2 window envelopes: your quickbooks or other accounting software invoices and statements will be completely hidden with our dark privacy security tint design - Our Number 9 Security Peel and Seal Envelopes are Just peel and seal to create a strong lasting seal without licking or moistening. Our sealing design is quick and easy and is guaranteed to stay sealed with no need for tape or glue sticks. - Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01M5HR1N3 | | Additional Features | Self-Adhesive Closure | | Best Sellers Rank | #22,744 in Office Products ( See Top 100 in Office Products ) #85 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 (610) | | Item Dimensions L x W | 8"L x 7"W | | Item Shape | Rectangular | | Manufacturer | Blue Summit Supplies | | Material Type | Paper | | Number of Items | 500 | | Recommended Uses For Product | Security | | Size | 1 Box | | Style | Self Sealing | | UPC | 865181000306 | | Unit Count | 500 Count | ## Product Details - **Brand:** Blue Summit Supplies - **Closure Type:** Self-Seal - **Color:** white - **Material:** Paper - **Number of Items:** 500 ## Images ![500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack - Image 1](https://m.media-amazon.com/images/I/71y19OQM3TL.jpg) ![500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack - Image 2](https://m.media-amazon.com/images/I/61ml7V1hOxL.jpg) ![500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack - Image 3](https://m.media-amazon.com/images/I/71QoH-LYlhL.jpg) ![500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack - Image 4](https://m.media-amazon.com/images/I/81a7gxuxbbL.jpg) ![500 Blue Summit #9 Double Window Security Envelopes Self Seal for Quickbooks Invoices and Business Statements Double window envelopes self seal #9-3 7/8 Inch X 8 7/8 Inch, 500 Pack - Image 5](https://m.media-amazon.com/images/I/7151CVELFmL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Professional look and great time saver *by B***T on February 4, 2017* This is a great product and at a very reasonable price. As a small membership-based nonprofit we send out an acknowledgement for every donation received. Having a quality #9 double window self seal security envelope has eliminated the need for hand addressing or generating mailing labels. Our logo and up to 4-line addressing fit the windows perfectly. The benefit of all the time saved and the professional look easily justifies the cost of the product. ### ⭐⭐⭐⭐⭐ Always goid *by B***E on December 29, 2025* Repeat irder ### ⭐⭐⭐⭐⭐ Works for QuickBooks Invoices and statements. *by A***R on June 9, 2024* Self adhesive envelopes that work good for QuickBooks invoices and statements. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.mx/products/37086617-500-blue-summit-9-double-window-security-envelopes-self-seal](https://www.desertcart.mx/products/37086617-500-blue-summit-9-double-window-security-envelopes-self-seal) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-04-24*