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20pcs Plastic Comb Binders Comb Binders 11mm/13mm/19mm Diameter Optional, A4 Size Paper Binding (13mm-Clear) : Amazon.co.uk: Stationery & Office Supplies
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RAYSON Plastic Spiral Binding Coils, 50 Sheets, 3:1 Pitch, 9.5mm, Multi-Coloured, A4, Pack of 100 : Amazon.co.uk: Stationery & Office Supplies
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