Heating Element Specifications 1 Heating element.2 Panasonic Philips Midea Gree Galanz FSL Delang etc suppler.3 China famous brand:WANHUASHAN KD Heating element. Watts and volts designed based on your needs.Filament: Tungsten. Shape: Linear, round, U, C etc Feature(spiral): 1. Tubular,double-ended quartz infrared lamps are high-powered heat sources incorporating a tungsten coil filament within a quartz envelope. 2. The filament is supported by tungsten supports at regular intervals to prevent sagging. These lamps produce a constant level of infrared irradiation throughout the lamp lifetime. 3.Their benefits for industrial purposes include high efficiency,fast heat transfer,direct response to power control,compactness and light weight.