Description New Ultra-Core Wicks are made right here in the USA and are a 100% natural option for your container candles. Ultra Core Candle wicks offers the rigidity of zinc . . . without the metal wire. This product line gives candle makers their independence from using zinc core wicks. Ultra Core is an all fiber wick. It has the rigidity of zinc core without any wire or paper in the core. The fibers used to construct Ultra-Core Wicks provide a incredible burn in ALL waxes! They have been tested in soy, paraffin, coconut, palm, beeswax, candle gel and many hybrid blends, and the Ultra-Cores did not disappoint! One wick that works in any wax has finally arrived.