100PCS A4 Binding Wire 1/2in Diameter 34 Double Loop 3:1 Pitch Nylon Coated Iron Wire Binding Spine

100PCS A4 Binding Wire 1/2in Diameter 34 Double Loop 3:1 Pitch Nylon Coated Iron Wire Binding SpineYou may also like 50Pcs Spiral Binding Coils Dia 19mm 3/4in 34 Teeth 3:1 Ratio 180 Sheet Capacity Nylon Coated Iron for A4 Paper.