Flat Cardboard 24 X 36 is made of single wall Kraft brown corrugated cardboard. Flutes run width wise on this corrugated sheet. Corrugated sheet
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Corrugated Cardboard Sheets 4mm - 3/16 Thick 24x36- 5 Pack. Filler Insert Pads, Brown Frame Backing Rectangular & Square Flat Boards for Art&Crafts, DIY Projects, Mailing,Dividers & Packaging
Chipboard pads are perfect to use as an envelope stiffener.Sturdy kraft fibreboard construction. Use to top layer cartons to help protect damage from box cutters and knives. Sold in case quantities.
Chipboard Pads 24-Inch x 36-Inch Kraft 110/Case CP2436