Sonus Composite 12/20/66 Continuous Sound Absorbing Perforations For A Monolithic AppearanceProduct Details:Perforation: 12mm/20mm/66mm o.c.Panel Thickness: 1/2″, 12.5mmNon-Woven Fabric: Charcoal GrayOpen Rate: 19.6%NRC: Up to .85Board Sizes:900 mm x 2700 mm*1188 mm x 1980 mm1188 mm x 2376 mm1188 mm x 2706 mm*Limited to stock on handProduct Data Sheet:Sonus Composite 12-20/66 Sonus Souns Round 6/18 Sonus Round 8/18 Sonus Round 10/23 Sonus Round 12/25 Sonus Round 15/30 Sonus Round 20/33 Sonus Square 8/18 Sonus Square 12/25 Sonus Composite 8-12/50 Sonus Composite 12-20/66 Strata Strata 8-15-20 Strata 12-20-35 Stratum Stratum Micro Stratum Round Stratum Slotted Stratum Square Installation Air Cleaning GypSorb® Patent Info Terms & Conditions Sonus Souns Round 6/18 Sonus Round 8/18 Sonus Round 10/23 Sonus Round 12/25 Sonus Round 15/30 Sonus Round 20/33 Sonus Square 8/18 Sonus Square 12/25 Sonus Composite 8-12/50 Sonus Composite 12-20/66 Strata Strata 8-15-20 Strata 12-20-35 Stratum Stratum Micro Stratum Round Stratum Slotted Stratum Square Installation Air Cleaning GypSorb® Patent Info Terms & Conditions