Roptex® (Brown Kraft) Open End Catalog with Pres-Stik® Open End Catalogs have their flap on the short dimension. These envelopes are manufactured with durable, SFI Certified Brown Kraft stock that has a vellum finish, center seam construction and a self-sealing latex adhesive.Brown Kraft (SFI CERTIFIED) Vellum FinishCenter Seam No Window Self-Sealing (Latex Adhesive)Flap Extended