Black binding covers for A4 size documents, accommodating up to 50 sheets. Features include quick binding and a slim design. This type is used for theses and similar academic work. I bought these at the university bookstore but never used them, and they've been sitting in a drawer. - Color: Black - Size: A4 - Capacity: Up to 50 sheets - Features: Quick binding, slim type, with tight seal Thank you for looking.