Fellowes 500mic translucent plastic A4 binding back cover (100 units) 54770 combines ultra-resistant thickness with an elegant matte finish. At 500 microns thick and made of translucent plastic, these back covers offer impressive rigidity without completely obscuring the light from the reverse side. They protect documents against moisture, tears, and creases under demanding use. Excellent for portfolios, technical proposals, and high-end product catalogs.