Versatile Compatibility: Fits both A4 size (8.3" x 11.7") and U.S. letter size (8.5" x 11") paper. For U.S. letter size, simply trim off two rings with scissors.
High Binding Capacity: Binds up to 90 sheets (80g/20lb paper), perfect for reports, presentations, and manuals.
User-Friendly Design: Easily reopens and closes for quick page addition or removal. Compatible with 3:1 pitch binding machines and 3:1 pitch paper (3 holes per inch), with hole spacing of 8.4mm from center to center.
Single Color Pack: Includes 30 White Spines.
Flexible Binding Margins: Margin size affects the number of sheets that can be bound; 3mm margin for 2-90 sheets (80g/20lb paper) and 6mm margin for 60 sheets (80g/20lb paper).
