Hayward IDXL2IGN1930 Silicon NitriDE Ignitor Replacement for Hayward Hayward H-Series Low Nox and Hot Tub Heater Ignitor replacement Fits hayward universal h-series low nox induced draft heater models h250idl2, h350idl2, h400idl2 Also fits hayward h-series low nox induced draft heater New part incorporated on all IDL Heaters built after 9/20/04 Made of silicon nitride; weighs 6.6-pound