This includes the thermopile (main valve sensor), fine thread thermocouple (pilot sensor), ignitor wire and ceramic probe, and the pilot tube. This includes the bracket that goes next to the burner which holds it all together.
Look at your bracket to ensure it is the same. This has a top mount bracket to attach it to the fireplace.
This pilot assembly uses the fine thread thermocouple, check yours for comparison.
Cross Reference
Heat-N-Glo: 4021-732 / 25660 / SRV4021-732 / 25174 / SRV25174
Heatilator: 4021-732 / 25660 / SRV4021-732 / 25174 / SRV25174
Quadrafire: 4021-732 / 25660 / SRV4021-732 / 25174 / SRV25174
Fits:
GBCL36 - Pre serial # GA1549727
GBCR36 - Pre serial # GA1549727
GBFL36 - Pre serial # GA1549727
GBiS36 & GBIS36L
GBST36 & GBST36L - Pre serial # GA1549727
GDCH36 & GDCH36L
GDCH60 & GDCH60L - Pre serial # GA1540727
GDCH60V & GDCH60LV
GDCL36 & GDCL36L
GDCL60 & GDCL60L - Pre serial # GA1549727
GDCR36 & GDCR36L
GDCR60 & GDCR60L - Pre serial # GA1548727
GDFL36 & GDFL36L
GDFL60 & GDFL60L - Pre serial # GA1548727
GDFL60V & GDFL60LV
GDST36 & GDST36L
GDST60 & GDST60L - Pre serial # GA1548727
GDST60V, GDST60LV
CD4236R & CD4236LR - Pre serial # GA1563745
CD4842R & CD4842LR - Pre serial # GA1563745
CGC150 & CGC150L - After date code 39/95
G141 & G141L
G270M & G270LM
GB4336 & GB4336L
GB4942 & GB4942L
GC150 & GC150L - After date code 39/95
GCBC36 & GCBC36L
GCBC42 & GCBC42L
GCBC60 & GCBC60L
GCBC80 & GCBC80L
GCDC36 & GCDC36L
GCDC42 & GCDC42L
GCDC60 & GCDC60F
GCDC80 & GCDC80L
GGBR60 & GGBR60L
GGBR80 & GGBR80L
GNBC30 & GNBC30L
GNBC33 & GNBC33L
GNBC36 & GNBC36L
GNBR30 & GNBR30L
GNBR33 & GNBR33L
GNBR36 & GNBR36L
GNDC30 & GNDC30L
GNDC33 & GNDC33
GNDC36 & GNDC36L
GNDH30 & GNDH30L
GNDH33 & GNDH33L
GNDH36 & GNDH36L
GNDR30 & GNDR30L
GNDR33 & GNDR33