10 X 13 Catalog White 24lb Envelopes - 50 Per Pack 10x13 open end white Catalog Envelopes. 50 per pack. 24lb. Paper Weight - Moistenable Glue Sealing Method. Laser and Inkjet printer compatible A durable ALL-PURPOSE mailing envelope. Ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more.