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21 holes plastic spring binder
Rectangular hole: 3x8mm
Manual binding system
Number of punched paper: 8-12 sheets of A4 (70gms)/time
The maximum number of papers attached to the spring: 500 sheets
Alignment and back adjustment function
Spring: 6mm - 51mm (20 - 500 sheets)
Weight: 4 kg
Dimensions: 415x270x165 mm
