WELLYOUNG Acoustic Board is a perforated 12mm gypsum board with air-cleaning effect including black or white acoustical EU standard Ahlstrom non-woven fabric on the back(special color when ordering). WELLYOUNG Perforated gypsum board Core material high grade glass fiber reinforced gypsum board perforation Micro hole 3/8.33R Square hole 10/20Q 12/25Q Circle hole 6/25(18)R 8/25R 12/25R Cross hold 8/12/50R Long Round hole 4*14LR Irregular hole (pop hole) 8/15/20R More design can be customized according to you requirements. Surface finish Front:white thick paper covering, 160G/SQM Back:High quality EU standard Ahlstrom non-woven fabric Thickness 12mm Size 1200*2400mm Dentisy 9.4kg/m2 Patterns H8-L4W2 Edge square Perforation rate 8.8%-14.2% Color White NRC 0.70 RH 70 Main Features Acoustic perforated gypsum board Light weight in unit acreage High edge rigidity Strong nail pull resistance Smooth,paintable surface NO visible joints and grid Sustainable,fully recyclable material Installs on any standard drywall suspension system Green environmental protection material