... ,sound insulation,heatp preservation have the most specificationsinChina hollow/ tubular wooden door coreGlue: E1 E2Width: 900mm, 1250mmThickness:18mm, 24mm, 28mm, 30mm, 33mm ... door and isolation boardFeatures:environmental protection, heat preservation, sound insulation, light in weight, anti-impact, stable in dimension, easy to processing. hollow/ tubular wooden door ...