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Fellowes Plastic Comb Bindings, 1/2" Diameter, 90 Sheet Capacity, Black, 100 Count per Pack - Walmart.com
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Amazon.com : CFS Products Plastic Comb Binding Spines, 1 Inch Diameter, Black, 200 Sheets, 100 Pack 13100 : Office Products
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Amazon.com : Rayson CR681012-BK Plastic Comb Binding Ring, 1/4in,5/16in,3/8in,1/2in, 19-Ring Letter Size, Black Comb Spines, Multi-Size Pack of 100 : Office Products
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Amazon.com : Fellowes Plastic Comb Bindings, 1.5 Inches, 340-Sheet Capacity, Black, 10 per Pack (52066) : Binding Spines : Office Products
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Factory Office Comb Binder RAYSON RS-12 Binding Machine Comb-Type/Clamp Folder of a4 Paper Bookbinding Machine - AliExpress
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