ValueOffice Sheet Protectors, Heavy Weight, Acid Free, Letter Size, Crystal Clear, Holds 8.5 x11 Inch Paper, Box of 200. Letter Size, Top Loading and Holds 8.5 x 11 Inch Papers; Heavy Weight and 3 Heavy Reinforced Holes Ready For Standard 3 Ring Binders; 3.3 Mil Thickness; Acid-free and Archival-safe Polypropylene Provides Super Crystal Clear View; Won't Lift Print or Smear Ink From Pages