Natural Gas Pilot Assembly, Works On The Following Water Heater Model #'s: 6-30-Yors, 6-30-Yors-d, 6-30-Yort-d, 6-40-Yort-d, 6-30-Yort4, 6-50-Yort4, Temperature Setting 190&degree., Please Make Sure To Use The Corresponding Pilot Assembly To The Water Heater, Refer To The Tag On The Original Pilot Assembly To Match With The New Pilot Assembly.