We no longer carry the self-sealing window envelopes. You can order other envelopes here.
Amazon Blue Summit self-sealing
Amazon.com : 500 No. 9 Flip and Seal Double Window Security Envelopes – Designed for Quickbooks Invoices and Business Statements with Self Seal Flip Press and Seal Flap -Number 9 Size 3 7/8 Inch X 8 7/8 Inch : Office Products
Amazon Office Depot Gumed