Specification External diameter :4m/m~200m/m Internal diameter :3m/m~200m/m Characteristic Keep heat-resistingly, wear-resistingly, softly and ventilativly, insulate against heat warm, breath in the sound, shock attenuation, filter, having extremely excellent charatceristics Application 1 Able to bear the high temperature and buffer the sleeve pipe material 2 Edible glass ware shaping material