TOPS Data Pad, 13-Column Heavyweight 50-Sheet Pads, Box of 10 Pads (3616) Versatile 13-column format helps record or tabulate a variety of data A summary column and 12 customizable column headers create a tailor-made 8-1/2" x 11" ledger High-quality, heavyweight bond paper provides a smooth writing surface Non-smear ink insures ongoing legibility Box of 10, 50-sheet data pads