This is an OEM Rediform National Heavyweight Reinforced Filler Paper pack containing 100 sheets. The paper features a Rip-Proof film strip along the binding edge, providing durability while maintaining a lightweight design with only 60% of the bulk of other reinforcing. Each sheet is three-hole punched with 9/32" holes, and the holes are reinforced with Mylar to prevent tears, making it ideal for use in ring binders.