... quality certification TUV,UL lower price 1.Performace and use :Quartz heating elements do not paint, radiation rate stability, high temperature ... radiation properties of rebate changes, Reasonable structure, easy to use. Quartz heating element with A wide range of uses and strong ... coefficient: 0.92 (a wavelength of 48um)4.Technology: Quartz heating whether it be proceed from the resistance wire (made ...