3M Adjustable In-Line Document Holder places documents in-line for easy viewing. Elastic line guide marks you place and keeps pages open. The 18" wide backplate and 300 sheet capacity supports just about any size document.The 3M Adjustable In Line Document Holder with Elastic Line Guide places documents in line with your monitor and keyboard reducing movement of eyes, neck and shoulders minimizing strain and increasing comfort. The stable weighted base allows ledge to dip below the desk edge increasing desk space. Elastic line guide marks you place, keeps pages open and stretches to accommodate even the thickest books. The 18" wide backplate and 300 sheet capacity supports books, catalogs and just about any size document. Angle and height adjust to suit your needs. Black/clear. 5 year warranty. 40% pre consumer recycled content.