750 microns (0.75mm) 550gsm GREYBOARD. Greyboard can be used to create rigid models that will be able to withstand years of wear and tear. Oversize A4 - 225 x 320mm (8.85 x 12.6"). Use 2 or more sheets if you need to go thicker, glues with PVA glue or a cleaner option is double sided tape.
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