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"Cambridge Copper Ceiling Tiles can be glued to an existing surface or dropped into a T-bar grid. Their faux copper finish bestows a warm luster. 2' x 2' (2' x 4' also available) Copper. Can be mounted directly to your ceiling using adhesive installed in both standard 1"" and slimline 9/16"" drop ceiling grid or placed beneath existing tiles to reface your outdated ceiling. Made from laminated 0.030"" thick rigid vinyl plastic. Lightweight and flexible for easy installation."