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Poster Board, 22″ x 28″, Black, Case Pack of 50 – AUK Sales
Pacon Poster Board, 22 X 28 Inches, Chalkboard Black, 25 Sheets : Target
BAZIC Poster Board Black 22 X 28, Bulk Boards for School Craft, 25-Pack
Pacon The Heavy Poster Board, 22-inch x 28-inch, Black, 25 Sheets (PAC53231) : Office Products
Pacon PAC5420 Poster Board Packs, 22 x 28, White, 10 Sheets : Ordinary Display Boards : Office Products
Premium Coated Poster Board, Black, 22 x 28, 25 Sheets
Poster Board - myghop
Thorlabs - TB5 Black Posterboard, 20 x 30 (508 mm x 762 mm), 1/16 (1.6 mm) Thick, 5 Sheets
You won't be disappointed in this true 18 point heavy coated poster board. It's colored on both sides with a durable smooth finish that does not bleed
Pacon The Heavy Poster Board, 22-inch x 28-inch, Black, 25 Sheets (PAC53231)
Pacon Poster Board, 22 X 28 Inches, Chalkboard Black, 25 Sheets : Target