... : L600*W600, L1200*W600mm6.Thickness: 12/15/18mm7.Standard Model: M, U, Cross, Rhombus, etc8.Acoustic Principle: Resonance Absorption9.Characteristic: ... Sound Absorption & Noise Reduction10.Eco-Friendly: Both China & EU Standard Class E111.Fire Resistance: GB8624-1997 Class B112.Mounting: Plan ...