SEAMLESS EDGE CONTINUITY Available Sizes R-1/3 927 (900mm x 2700mm) R-2/6 927 (900mm x 2700mm) R-2/4 1224 (1200mm x 2400mm) R-4/8 1224 (1200mm x 2400mm)* *(special order) Product Details Perforation Type: Round Perforation Size: 6mm Panel Thickness: 1/2″, 12.5mm Color of Non-Woven Fabric: Gray Open Rate: 7.1% – 9.8% NRC: Up to .65 Board Sizes: 900 mm x 2700 mm 1200 mm x 2400 mm Product Data Sheets: Stratum Round