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Description Gyptone sixto 63 comprises a 12.5mm gypsum core, with a geometric array of 12mm hexagonal perforations. Offering unobtrusive access to a matching Gyptone acoustic board, ACTIVair technology as standard, which absorbs and converts formaldehyde into non-harmful inert compounds. A Class C sound absorber with a 15% perforated area. Supplied as a complete set of frame and hatch. Features & Benefits Ideal for commercial spaces Untreated surface 510mm x 510mm x 12.5mm