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Amazon.com: SimbaLux Acrylic Sheet Clear Cast Plexiglass 12” x 12” Square Panel 1/2” Thick (13mm) Transparent Plastic Plexi Glass Board with Protective Paper for Signs, DIY Display Projects, Craft, Easy to Cut :
Amazon.com: Clear Acrylic Plexiglas Sheet , 1/4" Thick, 8" X 12" (Pack of 2) : Industrial & Scientific