--- product_id: 332281880 title: "500 Pack #10 Double Window Security Self-Seal Envelopes - Suitable Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes, Size 4-1/8 x 9-1/2 - White - 24 LB" brand: "herkka" price: "€ 107.62" currency: EUR in_stock: true reviews_count: 8 category: "Herkka" url: https://www.desertcart.be/products/332281880-500-pack-10-double-window-security-self-seal-envelopes-suitable store_origin: BE region: Belgium --- # 4-1/8 x 9-1/2 inch perfect fit Premium security tint for privacy Ultra-strong self-seal adhesive 500 Pack #10 Double Window Security Self-Seal Envelopes - Suitable Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes, Size 4-1/8 x 9-1/2 - White - 24 LB **Brand:** herkka **Price:** € 107.62 **Availability:** ✅ In Stock ## Summary > 📬 Seal the deal with security and style—mail like a pro, every time! ## Quick Answers - **What is this?** 500 Pack #10 Double Window Security Self-Seal Envelopes - Suitable Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes, Size 4-1/8 x 9-1/2 - White - 24 LB by herkka - **How much does it cost?** € 107.62 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/332281880-500-pack-10-double-window-security-self-seal-envelopes-suitable) ## Best For - herkka enthusiasts ## Why This Product - Trusted herkka brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Window Design:** Showcases sender & recipient addresses flawlessly for streamlined business mail. - • **Printer Compatible:** Smooth, thick 24 LB paper works seamlessly with inkjet and laser printers—no jams, just efficiency. - • **Premium Security Tint:** Protect sensitive info with a privacy-enhancing security pattern that blocks prying eyes. - • **Ultra-Strong Self-Seal:** Seal with confidence—no tape needed, stays shut during transit for worry-free mailing. - • **Massive 500-Pack Supply:** Stay stocked for months with a bulk pack designed for high-volume business mailing needs. ## Overview This 500-pack of #10 double window security envelopes offers a perfect 4-1/8 x 9-1/2 inch size tailored for business statements, invoices, and checks. Featuring a premium security tint to protect sensitive contents, ultra-strong self-seal adhesive for reliable closure, and compatibility with most printers, these 24 LB white envelopes provide a professional, efficient mailing solution for high-volume office needs. ## Description Product description HERKKA #10 Double Window Security Self-Seal Envelopes 500pack Great for Secure Everyday Home and Business Mailing Designed For Security and Convenience QUICK-SEAL CLOSURE SECURITY TINTED PATTERN STRONG SECURITY PRINTER COMPATIBLE More Similar Envelopes For Your Needs No.10 Windowless No.10 Single Window No.10 Double Window No.9 Double Window No.8 Double Window ## Features - #10 SECURITY ENVELOPES:Our #10 double window envelopes can easily read dual windows for everyday business mailings and postal addresses. You can use business mailing envelopes for sending invoices and checks. It's the suitable for secure business mailing, invoices, billing statements, checks, everyday home and other business mail. - DOUBLE WINDOW ENVELOPE DESIGN: Envelopes with dual window allows sender and recipient address to show through our unique 2 window, secure envelopes suitable for everyday business, legal mailing, and business billing statements while protecting sensitive contents and information. - PREMIUM SECURITY TINTED PATTERN: #10 Security envelopes are designed with a premium security printed design to provide the protection contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy. - ULTRA STRONG EASY SEAL: #10 envelopes are manufactured with ultra SELF-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear, ideal for mailing larger documents without splitting, is secured to stay sealed with no need for tape or glue sticks. - LONG LASTING SUPPLY: Each box has 500 envelopes which can meet a long lasting supply, ideal for mass mailing of everyday business tasks! Our envelopes with smooth thick paper, it's fully compatible with most ink jet and laser printers, can print quick and easily without worry about paper jams. Click the Orange Button to order now. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08Y8TWR38 | | Best Sellers Rank | #5,584 in Office Products ( See Top 100 in Office Products ) #25 in Business Mailing Envelopes | | Brand | HERKKA | | Brand Name | HERKKA | | Closure Type | Self-Seal | | Color | Self Seal-blue | | Customer Reviews | 4.7 out of 5 stars 634 Reviews | | Item Dimensions L x W | 9.5"L x 4.12"W | | Item Shape | Rectangular | | Manufacturer | HERKKA | | Material | Paper | | Material Type | Paper | | Number of Items | 500 | | Occasion | Business | | Occasion Type | Business | | Recommended Uses For Product | Security | | Size | Self Seal-blue | | Style | Self Seal-blue | | Unit Count | 500 Count | ## Product Details - **Brand:** HERKKA - **Closure Type:** Self-Seal - **Color:** Self Seal-blue - **Material:** Paper - **Occasion:** Business ## Images ![500 Pack #10 Double Window Security Self-Seal Envelopes - Suitable Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes, Size 4-1/8 x 9-1/2 - White - 24 LB - Image 1](https://m.media-amazon.com/images/I/71coV+gWAlS.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by L***N on February 20, 2026* ### ⭐⭐⭐⭐⭐ Review *by M***P on September 3, 2025* ### ⭐⭐⭐⭐⭐ Review *by M***E on February 16, 2026* ## Frequently Bought Together - 500 Pack #10 Double Window Security Self-Seal Envelopes - Suitable Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes, Size 4-1/8 x 9-1/2 - White - 24 LB - Amazon Basics Multipurpose Copy Printer Paper, 8.5" x 11", 20 lb, 8 Reams, 4000 Sheets, 92 Bright, White - Amazon Basics 1/3-Cut Tab, Assorted Positions File Folders, Letter Size, Manila - Pack of 100 --- ## 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.be/products/332281880-500-pack-10-double-window-security-self-seal-envelopes-suitable](https://www.desertcart.be/products/332281880-500-pack-10-double-window-security-self-seal-envelopes-suitable) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-18*