--- 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: "฿3957" currency: THB in_stock: true category: "Herkka" url: https://www.desertcart.co.th/products/332281880-500-pack-10-double-window-security-self-seal-envelopes-suitable store_origin: TH region: Thailand --- # 4-1/8 x 9-1/2 in perfect #10 size 500-pack bulk supply Premium security tint for privacy 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:** ฿3957 **Availability:** ✅ In Stock ## Summary > 📬 Seal your success with security and style! ## 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?** ฿3957 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/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 - • **Ultra-Secure Self-Seal:** Effortless peel-and-seal adhesive ensures tamper-proof closure—no tape needed, no worries about mail integrity. - • **Bulk Business Efficiency:** 500 envelopes per box means you’re always stocked for high-volume invoicing, billing, and return mail campaigns. - • **Dual Window Transparency:** Show sender & recipient addresses clearly with the unique double window design for seamless business mail flow. - • **Printer-Ready Compatibility:** Smooth 24 LB paper stock works flawlessly with inkjet and laser printers—print batch mailings without jams. - • **Privacy-First Security Tint:** Advanced security pattern blocks prying eyes, safeguarding sensitive invoices and statements every time. ## Overview This 500-pack of #10 double window security envelopes combines professional-grade privacy tinting with ultra-strong self-seal adhesive, perfectly sized for business invoices and statements. Designed for high-volume mailings, these 24 LB white envelopes are printer-friendly and built to protect sensitive information while streamlining your office mailing workflow. ## Description desertcart.com : 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 : Office Products ## 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 | #4,294 in Office Products ( See Top 100 in Office Products ) #23 in Business Mailing Envelopes | | Brand Name | HERKKA | | Closure Type | Self-Seal | | Color | Self Seal-blue | | Customer Reviews | 4.7 4.7 out of 5 stars (644) | | Item Dimensions L x W | 9.5"L x 4.12"W | | Item Shape | Rectangular | | Manufacturer | HERKKA | | 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) ## 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.co.th/products/332281880-500-pack-10-double-window-security-self-seal-envelopes-suitable](https://www.desertcart.co.th/products/332281880-500-pack-10-double-window-security-self-seal-envelopes-suitable) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-07-04*