3M Adjustable Document Copy Holder, In-line with Monitor Minimizing Head and Neck Movement, 300 Sheet Capacity Holds Sheets to Books, Elastic Line Guide Keeps Pages Open, 18" Wide, Black (DH640) 3M(TM) In-Line Book / Document Holder DH640, 11.0 in x 18.0 in x 4.0 in, Black 3M(TM) Copy Holder keeps documents in an easy to read, upright position. Designed to position directly between monitor and keyboard just below monitor. Elastic line guide marks your place, keeps pages open and stretches to accommodate even the thickest books. 18" wide, this model supports books, catalogs and just about any size document. Holds up to 300 sheets.