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Compared to chipboard, the cardboard inserts are pretty lightweight so they don't make your package too heavy.

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Item Description, This 50-pack of corrugated cardboard sheets is perfect for a wide array of DIY projects, and arts and crafts creations at home or in

50-Pack of Corrugated Cardboard Sheets 9x12, Flat Card Boards, Packaging Inserts for Shipping, Mailing, Arts and Crafts, DIY Projects, Packing

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★RIGID AND LIGHTWEIGHT★ These cardboard sheets are actually sturdy and rigid adding a good support for delivering for shipping cards, postcards,

36 Packs 12x12 Inch Cardboard Sheets, Premium Brown Kraft Corrugated Cardboard Backing and Corrugated Inserts Bulk for Shipping, Mailing,T-Shirts, DIY

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Large quantity: package comes with 50 piece of corrugated cardboard in total, sufficient quantity to meet your various needs; Strong material can

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50-Pack of Corrugated Cardboard Sheets 9x12, Flat Card Boards, Packaging Inserts for Shipping, Mailing, Arts and Crafts, DIY Projects, Packing Mailers, 2mm Thick