--- product_id: 519879118 title: "Columbian #10 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for Invoices, QuickBooks Checks and Business Mailings, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper" brand: "columbian" price: "290 zł" currency: PLN in_stock: true reviews_count: 13 category: "Columbian" url: https://www.desertcart.pl/products/519879118-columbian-10-security-envelopes-500-pack-double-window-self-seal store_origin: PL region: Poland --- # Self-seal adhesive for mess-free closure 4-1/8" x 9-1/2" perfect fit Blue security tint blocks prying eyes Columbian #10 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for Invoices, QuickBooks Checks and Business Mailings, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper **Brand:** columbian **Price:** 290 zł **Availability:** ✅ In Stock ## Summary > 📬 Seal your success with security and style! ## Quick Answers - **What is this?** Columbian #10 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for Invoices, QuickBooks Checks and Business Mailings, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper by columbian - **How much does it cost?** 290 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/519879118-columbian-10-security-envelopes-500-pack-double-window-self-seal) ## Best For - columbian enthusiasts ## Why This Product - Trusted columbian brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Sealing:** Redi-Seal press-to-seal adhesive eliminates peel strips and licking—fast, clean, and eco-friendly. - • **Premium 24-lb Paper:** Thick, durable white wove paper projects a high-quality image that withstands transit wear. - • **Bulk Ready for Business:** 500 envelopes per box keep your office stocked and ready for consistent, secure mailings. - • **Precision Double Windows:** Aligns recipient & return addresses flawlessly for a polished, professional look. - • **Confidentiality Guaranteed:** Blue security tint with safety pattern ensures sensitive info stays private, even under light. ## Overview Columbian #10 Double-Window Self-Seal Security Envelopes offer a professional, secure mailing solution with perfectly aligned windows for QuickBooks invoices, a blue security tint to protect confidential data, and a convenient mess-free self-seal closure. Crafted from durable 24-lb white wove paper, these envelopes come in a bulk pack of 500, ideal for busy offices and businesses prioritizing privacy and efficiency. ## Description Columbian #10 Business Envelopes are a great all-purpose solution for mailing letter-sized business documents, especially invoices, statements, and checks generated through QuickBooks and similar accounting software. Designed for everyday office use, these double window envelopes allow recipient and return addresses to align perfectly and show through cleanly, eliminating the need for manual addressing or labels. Measuring 4-1/8"" x 9-1/2"", they comfortably fit standard 8-1/2"" x 11"" sheets folded into thirds for efficient, professional mailings. Each self seal envelope is made from durable 24 lb white wove paper, offering a professional look that reflects well on businesses and schools. A blue security tint with an interior safety pattern helps block visibility through the paper, protecting sensitive information from being read during handling or delivery. The double window design is aligned for QuickBooks and other computer-generated documents, allowing recipient and return addresses to display cleanly while keeping financial details private. Mailing efficiency is improved with self seal business envelopes. A unique Redi-Seal closure has two adhesive flaps that you simply press together to seal—no moisture or peel strip trash. Packaged with 500 envelopes per box, Columbian #10 Self Seal Envelopes are a dependable, never-out essential for offices, small businesses, and households that value security, convenience, and organization in their daily mailing tasks. (Manufacturer Item Number: COLO134) Review: price is right - the stickiness was excellent. no problems Review: Easy ordering! Quick delivery! - These envelopes work so well for mass mailing! Quality in design makes them so dependable, no folds or stickiness. ## Features - #10 WINDOW ENVELOPES: Designed for invoices and statements from QuickBooks and other standard business software, these double window envelopes align perfectly so addresses show cleanly while amounts and data stay private - SECURE MAILING ENVELOPES: A blue security tint with safety pattern blocks visibility, helping safeguard confidential information from prying eyes, even when held up to light - FAST, MESS-FREE SELF SEAL ENVELOPES: Redi-Seal envelopes feature press-to-seal adhesive flaps that create a secure closure without peel-strip trash, licking envelopes, or the need for wet sponges - PRESENT A PROFESSIONAL IMAGE: Thick 24 lb white wove paper with side seams creates a crisp, high-quality look that reflects well on your business and holds up in transit - BULK VALUE PACK: Stock up on 500 security envelopes that keep offices, small businesses, schools and homes stocked and ready for consistent mailing needs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BVBQRM77 | | Best Sellers Rank | #15,712 in Office Products ( See Top 100 in Office Products ) #78 in Business Mailing Envelopes | | Brand | Columbian | | Closure | Self-Seal | | Color | Blue,White | | Customer Reviews | 4.4 4.4 out of 5 stars (97) | | Date First Available | February 9, 2023 | | Item Weight | 5.92 pounds | | Item model number | COLO134 | | Manufacturer | TOPS Products | | Manufacturer Part Number | COLO134 | | Material Type | Paper | | Number of Items | 500 | | Product Dimensions | 9.5 x 4.13 x 0.04 inches | | Shape | Rectangular | | Size | One Size | ## Product Details - **Brand:** Columbian - **Closure Type:** Self-Seal - **Color:** Blue,White - **Material:** Paper - **Number of Items:** 500 ## Images ![Columbian #10 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for Invoices, QuickBooks Checks and Business Mailings, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper - Image 1](https://m.media-amazon.com/images/I/61Ej33PgoqL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ price is right *by S***R on December 10, 2025* the stickiness was excellent. no problems ### ⭐⭐⭐⭐⭐ Easy ordering! Quick delivery! *by P***R on January 13, 2026* These envelopes work so well for mass mailing! Quality in design makes them so dependable, no folds or stickiness. ### ⭐⭐⭐⭐⭐ No lick. Fold and stick.! *by A***S on July 21, 2025* This is my fourth box of these and they are great envelopes. --- ## 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.pl/products/519879118-columbian-10-security-envelopes-500-pack-double-window-self-seal](https://www.desertcart.pl/products/519879118-columbian-10-security-envelopes-500-pack-double-window-self-seal) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*