20lb, 92 Brightness, 8.5" x 11" Letter Size.  500 Sheets Per Ream,  Case of 10 Reams.  Our most popular paper.  Made by International Paper. Letter Size Multipurpose Copy Paper.  Bright White, High Use Quality Sheet for Everyday Use. Compatible with Laser and Inkjet Printers, Copiers and Plain Paper Fax Machines.  Acid Free / Archival Quality.  Jam Free Performance.  Manufactured in USA.  Our BEST seller