... . Property of infrared black ceramic heater tube:This tube is made of carborundum,when connected to ... electric current,heat energy permeate through the tube,then radiate infrared with wavelength of 3 μ~ ... μ.,which the quartz tube,infrared bulb ect can not get.Purpose:Dryness:drying for leather,lumber,metal,plywood ... 10 times,which greatly shorten time of heating up.Save electric power about 30 %~ 50 ...