Yangzhong DingNouer Electric Appliance Co., Ltd. (short for DNR next), founded in 2005, is a high-tech industry integrated the production and operation. Mainly engaged in the research and development of non-standard electric heating elements. Specialize on the high power density, high temperature environment, ultrahigh life-span products. Application for 3 D printers, nuclear power, spacecraft hydrogen igniter, bolt heater (air heater without tempreture controlno, power density is up to 60 w/cm2), firerod cartridge heaters (used for charcoal stove, power density is 12 w/cm2). The DNR firerod cartridge heater has been tested to reach more than 3000 times life cycle(In general, the ETL, UL describe lifespan for caloric test, power on-off cycle reached 1000 times).