... of weatherproof carbon steel sheet and the core of firprofing rock wool.production descriptionthickness:the thickness of upper and lower plate:0.2 ... Ships, metallurgy, electric power, construction and other industries.Our Rock Wool Panel mostly used for building wall, roof heat preservation sound ... well fire and noise reduction. Normal size:thickness of Rock Wool:50,75,100mm.top board:0.4-0.5mm,back ...