Office Deed #8 Double Window Security self seal Check Envelopes are designed for QuickBooks checks & computer printed checks. Our #8 double windowed envelopes designed & positioned in such way that your check amounts and memos will be hidden. These are made from high-quality 24-lb white wove. Wove finish adds a professional touch. Envelopes designed to Protect confidential QuickBooks checks, laser checks, computer checks & payroll checks information with our security tinted envelopes. The blue tint pattern makes it impossible to see the details of the contents, even when held up to the light. Mail Quickbooks checks and other important documents with confidence. The woven finish gives them a neat appearance and professional appearance. The gummed flap provides for quick and easy sealing. The box contains 500 individual white business envelopes.