... ,sound insulation,heatp preservation have the most specificationsinChina hollow/ tubular wooden door coreGlue: E1 E2Width: 900mm, 1250mmThickness:18mm, 24mm, 28mm, ... 18-27mmDensity: 300-400kg/m3Application: the core of flat door and isolation boardFeatures:environmental protection, heat preservation, sound insulation, ... , stable in dimension, easy to processing. hollow/ tubular wooden door core