#lb tyvek

9 x 12 Open-End Envelopes in 14 lb. Tyvek for Mailing a Business Letter, Catalog, Financial Document, Magazine, Pamphlet, 50 Pack

11 1/2 x 14 1/2 Open End Envelopes - 14lb. Tyvek Perfect for mailing Documents, Catalogs, Direct Mail, Promotional Material, Brochures and More 75936-250

11 1/2 x 14 1/2 Open End Envelopes - 14lb. Tyvek Perfect for mailing Documents, Catalogs, Direct Mail, Promotional Material, Brochures and More 75936-1M

11 1/2 x 14 1/2 Open End Envelopes - 14lb. Tyvek Perfect for mailing Documents, Catalogs, Direct Mail, Promotional Material, Brochures and More 75936-50