Aimoh Self Seal Double Window Security Tinted Check Envelopes – Five hundred envelopes per box, Premium 24 lb paper - White with a smooth woven finish, Designed to use with Quick Books and business printed checks, Perfect size, Measuring perfectly 3 5/8 inches x 8 11/16 inches preventing checks from sliding and moving, ensuring sensitive details remain hidden, Custom designed positioned dual windows for mailing printed business checks, QuickBooks, Laser Checks, The height of the Top Window is 7/8 of an inch X 3-1/2 inches wide and is positioned 3/8 inches from the left and 2-3/8 inches from the bottom, The height of the Bottom Window is 7/8 of an inch X 3-1/2 inches wide and is positioned 7/8 inches from the left and 3/4 inches from the bottom, Premium Security Tint Pattern, Ultra secure tinted pattern for added privacy and confidentiality, Quick-Seal Strip - No water required, uses a premium grade adhesive peel and seal designed strip to create a strong self-sealing seal peel the strip and fold the flap then press for a quick, secure seal, Five hundred envelopes per box, Premium 24 lb paper - White with a smooth woven finish, Self-Seal Double Window envelopes Custom designed to be compatible to use with Quick Books and business printed checks, 92663-1238657-30180 envelope