5pcs 30 Hole Loose-leaf Plastic Binding Ring Spiral Rings for 30 Holes A4 A5 A6 Paper Notebook Stationery Office Supplies

5pcs 30 Hole Loose-leaf Plastic Binding Ring Spiral Rings for 30 Holes A4 A5 A6 Paper Notebook Stationery Office Supplies

10mm can hold appro 45 sheets of paper;

12mm can hold appro 55 sheets of paper;