Esselte 5902812134391 is an A4 size folder with a black exterior made of rubber. It is designed for storing documents and other important materials securely. The folder has a black finish with a rubber texture for a classic look and a protective feel. It is equipped with two clasps for increased security. The folder has an expandable spine for additional storage capacity. It also includes an ID window for easy identification of contents and a convenient label holder for quick organization.