Fellowes 500mic matte black plastic A4 binding back cover (100 units) 54772 offers maximum durability and rigidity for intensive use bindings. Made of 500-micron thick matte black polypropylene, these 100 back covers ensure that the document remains perfectly flat and protected from impacts. The matte black conveys a sober, elegant and very rigorous image. Recommended for executive reports, formal proposals and lifelong archival documents.