Binding Machine, 21-Holes, 450 Sheets, Comb Binding Machines with Starter Kit 100 PCS 3/8" Comb Binding Spines, Comb Binder Machine Book Maker Perfect for Letter Size, A4, A5 or Smaller Sizes. 【Humanized Design】: comb binding machine is suitable for Letter Size (19 holes), A4 Size (21 holes), A5 Size (15 holes).
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