CONTINUOUS SOUND ABSORBING PERFORATIONS FOR A MONOLITHIC APPEARANCE Product Details: Perforation: 12mm / 25mm o.c. Panel Thickness: 1/2″, 12.5mm Non-Woven Fabric: Charcoal Gray Open Rate: 23% NRC: Up to .90 Board Sizes: 1200 mm x 2000 mm 1200 mm x 2400 mm 1200 mm x 2700 mm 900 mm x 2700 mm Product Data Sheet: Sonus Square 12/25