Panels are custom built to suit the specified requirement. Each panel thickness is 100mm maximum; width is 1200mm respectively, which shall conform to the manufacturer’s standard. Individual panel is reinforced with welded steel frame and both sides of the outer surface are mounted with 12mm particle board. Internal structure is built with steel mechanism incorporating superior performance Top and Bottom retractable sound seals device. Internal space/ cavities are filled with not less 60kg M thick rock wool.