2018-04-21 It’s sandwich panels with Rock Mineral Wool and two sides steel plate. Normally, Rock Mineral Wool sandwich panels’ thickness include: 50mm, 75mm, 100mm, 150mm, 200mm.Heat conductivity coefficient (U value) of these panels is 0.043W/(mk). While insulated PU panels is 0.022W/(mk) and PU panels is 0.0