Rediform Heavyweight Reinforced Filler Paper - Letter

100 Sheets - Plain - Stapled/Glued - 20 lb Basis Weight - Letter - 8 1/2" x 11" Sheet Size - White Paper - Heavyweight, Reinforced Edges, Punched - 100 / Pack. Rip-Proof film strip along the binding edge. Though Rip-Proof film is strong, it has only 60% of the bulk of other reinforcing for more pages in ring binders.