... free, Non-combustible,ISO,PSB, Moisture resistant ,fire proof,magnesium oxide board,A grade mgo boardmagnesium oxide board,fireproof board,magnesium fireproof ... boardFeatures: 1) 100% asbestos free2) Non-combustible: PSB, GB8624, CLASS A 3) Moisture resistant4) Excellent impact resistant 5) Excellent Sound insulation6 ...