Hayward FDXLTER1930 FD Thermistor Replacement for Hayward Universal H-Series Low Nox Pool Heater<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement fd thermistor</li><li>Fits hayward universal h-series low nox pool heater models h150fdn， h150fdp， h200fdn， h200fdp， h250fdn， h250fdp</li><li>Also fits hayward universal h-series low nox pool heater models h300fdn， h300fdp， h350fdn， h350fdp， h400fdn， h400fdp</li><li>Weight 4 pounds</li></ul></div><img src="http://ecx.images-amazon.com/images/I/418hGG8g6WL.jpg" noproxy>