Boise X-9 Hi-Brite Multipurpose Paper, Copier, Fax, Laser, Inkjet Printer, 8 1/2 Inch x 11 Letter Size, 20 lb., 96 Bright White, Acid Free, Ream, 500 Total Sheets (MP1050) One single ream (500 Sheets), 8.5 x 11" Letter size, 20 lb. Density, 96 US / 109 Euro Bright Trusted consistent performance; formulated for excellent runnability; laser guaranteed For use in copiers, plain paper faxes, laser printers, and inkjet printers High opacity and superior brightness for less show-through on 2-sided copying and printing Acid-free for archival quality. FSC Chain of Custody certified