Check Envelopes #8 Double Window Security Envelopes for Quickbooks, Business & Computer Checks 3 5/8" X 8 11/16" with Heavy Duty Storage Box by Pinnacle Perfect Fit for Quickbooks Checks & Other Computer Printed Checks: Thanks to their custom crafted #8 size, your Pinnacle window envelopes easily accommodate all computer printed voucher checks. Alignment & Security that Counts: No need to toggle with your Quickbooks, QB online, or Quicken settings. Only addresses will show through our double window design. Stronger Gummed Adhesive: Just moisten, press, and you're set. These computer check envelopes seal extra securely, so you can be sure they won't come open in transit. Superior All-American Quality: Made in the USA by a respected manufacturer, your premium #8 envelopes feature 24-lb. white wove paper stock, the gold standard for first-class mailings. Ultimate Security Envelopes: Each Pinnacle envelope is tinted inside with a dense, dark, numerical pattern. Rest assured your account numbers & sensitive data will be shielded from prying eyes. Heavy duty easy open storage box included. Love it or your money back.