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Amazon.com : 20 Pieces Binding Bars Slide Grip Binding Bars A4 Spine Bars for Report Cover School and Office, 12 Inch, 40 Sheet Capacity : Office Products
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Amazon.com : 30 Pieces Binding Bars Slide Grip Binding Bars for Office School Report Cover, A4 Size, 30 Sheets Capacity, 12 Inch (Black) : Office Products
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