--- product_id: 39300551 title: "Blue Summit 500 Left Window Envelopes Self Seal #10 -QuickBooks Invoices, Checks and Letter Size Business Statements - Single Window Envelopes Self Seal #10 with Security Tint. 4 1/8 X 9 1/2, 500 Pack" brand: "blue summit supplies" price: "£40.45" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/39300551-blue-summit-500-left-window-envelopes-self-seal-10-quickbooks store_origin: GB region: United Kingdom --- # 4.125" x 9.5" size Self-seal closure Dark security tint Blue Summit 500 Left Window Envelopes Self Seal #10 -QuickBooks Invoices, Checks and Letter Size Business Statements - Single Window Envelopes Self Seal #10 with Security Tint. 4 1/8 X 9 1/2, 500 Pack **Brand:** blue summit supplies **Price:** £40.45 **Availability:** ✅ In Stock ## Summary > 📬 Seal the Deal with Style! ## Quick Answers - **What is this?** Blue Summit 500 Left Window Envelopes Self Seal #10 -QuickBooks Invoices, Checks and Letter Size Business Statements - Single Window Envelopes Self Seal #10 with Security Tint. 4 1/8 X 9 1/2, 500 Pack by blue summit supplies - **How much does it cost?** £40.45 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/39300551-blue-summit-500-left-window-envelopes-self-seal-10-quickbooks) ## 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 - • **Versatile Use:** Perfect for invoices, checks, and billing statements. - • **Enhanced Security:** Dark tint ensures your sensitive information stays private. - • **Time-Saving Design:** Easily stuff multiple documents, including smaller envelopes. - • **Quick & Easy Mailing:** Peel and seal for a hassle-free, secure closure. - • **Professional Presentation:** Elevate your business correspondence with sleek, single window design. ## Overview The 500 No. 10 Self Seal Single Window Security Envelopes by Blue Summit Supplies are designed for efficient and secure mailing of invoices, checks, and business statements. With a convenient self-seal closure and a professional appearance, these envelopes ensure your correspondence is both stylish and secure. ## Description 500 No. 10 Self Seal Single Window Security Envelopes -Designed for QuickBooks Invoices and Business Statements - Computer Printed Checks with Strong Peel and Seal Flap - Number 10 Size 4 1/8 X 9 1/2 ## Features - Perfect for mailing Invoices, QuickBooks Invoices and checks, billing statements, checks, and other business mail. - Create professional looking mail with the added security of a single window envelope. Your business mail recipient address will show through the single window and you can quickly print your return address or add return address labels - Just peel and seal for a strong lasting seal. Our security envelopes will quickly and easily create a strong seal for completely secure business mail. - Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. - Provides complete business mail security: your professional business mail will be completely hidden with our dark security tint design ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Blue Summit Supplies | | Brand | Blue Summit Supplies | | Item Weight | 6.12 pounds | | Product Dimensions | 9.5 x 4.13 x 0.04 inches | | Item model number | BSS-92588-004 | | Is Discontinued By Manufacturer | No | | Color | white | | Closure | Self-Seal | | Shape | Rectangular | | Material Type | Paper | | Size | 4 1/8 X 9 1/2 inches | | Sheet Size | 4.125-x-9.5-inch | | Manufacturer Part Number | BSS-92588-004 | ## Product Details - **Brand:** Blue Summit Supplies - **Color:** white - **Closure Type:** Self-Seal - **Material:** Paper - **Special Feature:** Security Tint, Self Adhesive ## Images ![Blue Summit 500 Left Window Envelopes Self Seal #10 -QuickBooks Invoices, Checks and Letter Size Business Statements - Single Window Envelopes Self Seal #10 with Security Tint. 4 1/8 X 9 1/2, 500 Pack - Image 1](https://m.media-amazon.com/images/I/71o7nfrAmKL.jpg) ## Frequently Bought Together - 500 No. 10 Self Seal Single Window Security Envelopes -Designed for QuickBooks Invoices and Business Statements - Computer Printed Checks with Strong Peel and Seal Flap - Number 10 Size 4 1/8 X 9 1/2 - Amazon Basics #10 Security-Tinted Self-Seal Business Letter Envelopes, Peel & Seal Closure - 500-Pack, White - 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.co.uk/products/39300551-blue-summit-500-left-window-envelopes-self-seal-10-quickbooks](https://www.desertcart.co.uk/products/39300551-blue-summit-500-left-window-envelopes-self-seal-10-quickbooks) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-21*