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About ValBox. Engaged in envelopes, paper boxes and other home and office paper products supplies, Valbox is a direct-sale store of a paper products manufacture. We advocate the love and natural concept, insisting on using recycled material in the process of production. Hope Valbox can provide you, our valued customers, the high quality products and intimate service. ValBox #10, 4-1/8x9-1/2" Quick-Seal Closure Security Envelopes 200pcs Premium quality. Guaranteed to fit QuickBooks and computer checks perfectly! Our #10 Security Tinted Self Seal Envelopes are a premium choice with a number of key benefits: ✉️ Large, windowless design, perfect for hand addressing. ✉️ Security tinted pattern, perfect for protecting sensitive information. ✉️ Perfect for thicker and larger documents. ✉️ Ultra secure self seal strip for quick, strong mailing. ✉️ Long lasting 200 envelope supply in every box, perfect for everyday use. Protect your check security. 24 LB White wove paper, security tint design and stronger glue. Your checks will be secure with an easy to use and being a professional look from the box all the way to your destination. 100% Money Back Guarantee. We are confident you would love our ValBox products in its quality and price. However, if there's anything make you unhappy or unsatifaction, please do contact us without any hesitation. A replacement or 100% refund will be immediately provided to you.