Magnesium metal stud High strengh 3-50mm thick One of the best MgO ... of functional MgO board Magnesium Oxide Board,as Magnesium metal stud,has the features as follows:(1)Non-flammability: Gemtreeboard is ... board on both sides of studsSound insulation42dB9mm MgO board+75 stud+50 rockwoolBending strength16MPa9mmImpacting strength5.5Kj/m29mmEnvironmentNo radioaction, asbestos or formaldehyde ...