21st Century's Fiberglass Kerosene Heater Wicks are made of graphite coated fiberglass, a re-inforced cloth band and the highest quality cotton. Wick Model 123 fits Enviro-Temp 6800-30460, Heat Mate HMN-110, Sanyo OHR-240, OHRG-23H, Sengoku CTN 110, Yuasa J5, and more Contact us for a free cross reference chart..