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 143 fits Note The following heaters require either 143 (top only) or wick 148 (top and bottom) Comfort Glow GRE8, GRW8, GRWB (A), Koehring KR8, KRW8, KRB93, Sears 5640201, 56402060 Contact us for a free cross reference chart..