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PERFORMORE 100 Pack of Binding Presentation Covers for Binding Machines, 8.5" X 11" 0.18mm Thick, Crystal Clear Plastic Report Covers for Documents Files and More : Office Products - Amazon.com
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Amazon.com : TIANSE Binding Machine, Spiral Coil Binder Machine, Manual Book Maker Punch Binder with Electric Coil Inserter,Suit for Letter Size / A4 / A5 with 100pcs 5/16'' Plastic Coil Binding Spines