Universal® Self-Stick Open End Catalog Envelope, #10 1/2, Square Flap, Self-Adhesive Closure, 9 x 12, Brown Kraft, 250/Box (UNV35290) Case of 250Universal Self Stick Open End Catalog Envelope Press and seal permanently to safeguard important documents. No moisture needed. Just fold down the flap, press and mail. Global Product Type: Catalog Envelopes Seam Type: Center Flap Type: Square Trade Size: #10 1 2 Security Tinted: No Opening: Open End Envelopes Mailers Closure: Self Adhesive Exterior Material(s): Kraft Paper Stock Basis Weight: 28 lb Bond Envelopes Mailers Exterior Dimensions: 9 x 12