#10 Open End Envelopes w/Peel & Press (4 1/8 x 9 1/2) - Midnight Black (50 Qty.) | Perfect for Small Business Use and Invitations #10 Open End Envelopes (4 1/8" x 9 1/2") Color: 80lb. Midnight Black - LUX Midnight Black will never be the wrong decision for your V.I.P announcement. Midnight Black is a striking and bold LUX Color. 50 envelopes per pack Featuring - Peel & Press Sealing Method and Laser & Inkjet compatible Perfect for sending important documents or flat items, as well as small items and parts.