... of light steel structure prefab house with the EPS color steel sandwich panel ,rock wool,PU for the insulation ... channelU type,galvanized,thick is 0.8mmSquare columnPainted, with color steel compression decorative partsWall beamC type with paintRoof beamWith ... paintPurlineC type with paintCeilingEPS color steel sandwich panel ,rock wool,PU for the insulationWall ...