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Use these flat card board to protect important documents from bending when posting them. Multi-Purpose: Use these cardboard backing for photo backing,

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50 Packs 8x10 Inch Corrugated Cardboard Sheets, Premium Brown Kraft Corrugated Pads Cardboard Inserts Bulk Flat for T-Shirts, Shipping, Mailing, DIY Décor and Crafts : Office Products

Corrugated Cardboard Filler Insert Sheet Pads 1/8 Thick - 8.5 x 11 Inches for packing, mailing, and crafts - 25 Pack : Office Products

50 Packs 8x10 Inch Corrugated Cardboard Sheets, Premium Brown Kraft Corrugated Pads Cardboard Inserts Bulk Flat for T-Shirts, Shipping, Mailing, DIY Décor and Crafts : Office Products

10 Ecoswift 5x7 Corrugated Cardboard Filler Inserts Sheet Pads 1/8 Thick 5 x 7

Thick Kraft Paperboard for Card Making, Scrapbooking, Packaging, Crafts Heavy Cardboard Chip Board Paper 25 Sheets 6x9 or 8 1/2 X 11

Mat Board Center, 25 pack 5x7 Brown Cardboard sheet, 1/8 inch thick, Flat Corrugated Cardboard Inserts for Packing, Shipping, Mailing, Cardboard Backing, Art Craft Card Board : Office Products

100 Pack Corrugated Cardboard Sheets 5 x 7 Inch, India

Mat Board Center, 25 pack 9x12 Corrugated Cardboard

Mat Board Center, 50 Corrugated Cardboard Sheets 11x17 Inches Flat Card Board Inserts for Packing, Shipping, Mailing, DIY Crafts - Yahoo Shopping

Corrugated Cardboard Filler Insert Sheet Pads 1/8 Thick - 14 x 11 Inches for Pa

Corrugated Cardboard Boxes in Moving Boxes

Mat Board Center, 25 pack 8x10 Corrugated Cardboard