Binding Spines,Cinch Binding Wires,Double Coil Binding Spine Durable 20 Sheets Capacity for A4 Paper Organization (Black)

["[HIGH CAPACITY] EASILY HOLDS UP TO 20 SHEETS OF A4 PAPER FOR EFFICIENT ORGANIZATION","[DURABLE IRON BUILD] STURDY AND WEAR- IRON WIRE ENSURES LONGEVITY","[NYLON COATING] PROVIDES A GLOSSY SURFACE WITH EROSION AND ABRASION RESISTANCE","[PRECISE 6.4MM DIAMETER] 3:1 PITCH WITH 34 DOUBLE RINGS FOR VERSATILE BINDING","[WIDE APPLICATION] SUITABLE FOR VARIOUS DOCUMENTS, BOOKS, NOTES, AND REPORTS"]