500 No. 10 Self Seal Double Window Security Envelopes - Perfect Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes - Number 10 Size 4 1/8 Inch X 9 ½ Inch

Key features

• Perfect for mailing Invoices, QuickBooks Invoices, billing statements, checks, and other business mail. Your return and sender address will line up perfectly
• Just peel and seal for a strong lasting seal. Our security envelopes will quickly and easily create a strong seal for completely secure business mail.
• No need to spend time and money stamping, adding return labels, or spending extra money on custom envelopes, just quickly slide in your business mail to create professional looking business mail
• Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker.
• Provides complete business mail security: your business mail will be completely hidden with our dark security tint design