valbox 500 count #10 double window envelopes 4-1/8x9-1/2" self seal security envelopes for quickbooks invoices, business statements and legal documents valbox "about valbox. </br> </br> 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. </br> </br> valbox 4 1/8 x 9 1/2"" quick-seal closure #10 double window envelopes</br> </br> premium quality. protect to fit quickbooks invoice and business statement perfectly!</br> </br> window line up perfectly.</br> </br> protect your invoice and statements security.</br> </br> 24 lb white wove paper, security tint design and stronger glue. your contents will be secure with an easy to use and being a professional look from the box all the way to your destination."