CONTINUOUS SOUND ABSORBING PERFORATIONS FOR A MONOLITHIC APPEARANCE Product Details: Perforation: 10mm / 23mm o.c. Panel Thickness: 1/2″, 12.5mm Non-Woven Fabric: Charcoal Gray Open Rate: 14.8% NRC: Up to .85 Board Sizes: 1196 mm x 2001 mm 1196 mm x 2392 mm 1196 mm x 2691 mm Product Data Sheet: Sonus Round 10/23