Insulation metal PU sandwich wall panel 

Insulation metal PU sandwich wall panel Surface Middle layer inner layer  Al-Zn Alloy Coated Steel Sheet -  Thk: 0.3mm -  Heat-resisting painting  - Standard size: 3800 *380 *16mm  - heat insulation PU foaming  - fire proof rate: B2  - PU thk: 1.6cm  - Aluminium foil paper

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