Pilot assembly used on Vent Free Buck Stove, Majestic and Vermont Castings vent free gas fireplace and other vent free brands. Part is for LP Propane  gas and marked 8404 on bottom of the pilot assembly.

Gas repair parts are not returnable

Buck part PE 8404C LP

Also used on vent free Majestic Dutchwest and Vermont Castings products under part number 55465

This part is also a replacement for part 1601930 for some Vermont Castings Vent Free Stoves