... excellent effect of fire proofing& inflaming retarding. Heat insulation. Color: black Weight: 30g, 50g. 60g. It is special noise insulation and ... in the glass wool wind pipe liner . wear-resistant black&thin carpet which is covered on glass wool board,can absorb noise ... the tuyere notch.sound-absorption,fireproofing, noise resistence,inflaming retarding. black surface mat