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16 Pack A3 Foam Boards AHUNTTER White 5mm Thick Polystyrene Foam Core Sheets Large Styrofoam Board for Crafts (297 x 420mm) : Amazon.co.uk: Stationery & Office Supplies
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AKOLAFE 24 x A3 Foam Board Polystyrene Sheet 3mm Thick Foam Sheets for Crafts, Model Making and Painting (420 × 297mm) : Amazon.co.uk: Stationery & Office Supplies
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