Hi Limit Heat Sensor, L-200°F Ceramic, Large Surface Mount, Manual Reset.
 Fits the Following: Enviro Pellet: EF1, EF2, EF3, EF4, EF5 Evolution, Empress FPI, Empress FS, M55, Maxx, Meridian, Milan, Omega, P3, P4, Solus, Windsor. 
Hudson River Pellet: Chatham, Davenport, Kinderhook. 
Vista Flame Pellet: VF100, VF Windsor.
Regency Pellet: GF55, GFI55.