... sandwich panel Rockwool Fireproof handmade sandwich panel: Specification:1. External and internal steel plate:Thickness: 0.4-1.0mm2. Core ... material:Type: rock wool, PU, Glass woolDensity: 80-120kg/m3Thickness: 50mm, 75mm, 100mm3.Panel width: 950mm, ... Steel Plate Profile Co., Ltd.. is a professional (sandwich panel) Julong North Industrial Development Zone, Pingzhou, Nanhai District, ...