Smokin' Screws spiral design brings in just the right amount of air to achieve the "Goldilocks" temperature. Not too hot an ember temperature or too cold. That means less residue for you, and your pipe. Some experimentation with packing density is required to find the "right" burn temperature for our technology in your pipe. USA and International patents pending. WO2017/180197 WIRE Stainless steel melting temperature of 2700 deg F. MSDS available upon request. MADE IN USA