Orifice .020 Dia kit used in the 2000 2001 2002 2101 2102 55UD HFT2100 HFT2700 HFT2900FP. Cannot be used in the Honeywell HE220 HE225 HE260 HE265 HE360 HE365. For Honeywell applications use 32001752-001.