20 pieces of book board.Each piece is 8.5" x 5.5" (about 215mm x 140mm).This is an archival quality, composite grey cardboard specifically designed for bookbinding.Acid free and lignin free.Thickness is 90 pt.You will get 20 pieces, each 8.5" x 5.5"Boards will be a mixture of long and short grain.
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1 in. x 6 in. x 8 ft. Common Board 914770 - The Home Depot
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