Renz Wire Binding Rings, 3:1 (34 loops), 6.9mm (1/4 inches), 100pcs/box, Black color (can bind up to 30 sheets)
Renz Wire Binding Rings¬†come in either 3:1 pitch (3 holes per inch) or 2:1 pitch (2 holes per inch). 3:1 pitch can be supplied from 3/16″ (Size 5.5mm) upto 9/16″ (Size 14.3). 2:1 pitch can be supplied from 5/8″ (size 16mm) rite up to 1 1/2″ (size 38mm) allowing a maximium of 340 pages of 80 gsmto be bound.
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