Max. Punching(70-80g,sheets)- 25Max. Binding(70-80g,sheets) -500 sheetsHole quantity(pc) - 34Suitable paper size- A4/B5/Letter/A5/etc.Hole distance(MM) - 8.47Hole size(MM) - 4×4 or Φ4.5For Spiral; 1/4'',5/16'',7/16'',9/16'',11/16'',13/16'', 1'',1-1/4'',1-3/8'',1-1/2'',1-3/4'',2''