NAT/LP PILOT, FACTORY # 1890-023, PILOT KIT ONLY # 51-1108;TUBE SIZE 3/16" & 1/4",;FLAME PATTERN STRAIGHT, INCLUDES AIR DUCT & SCREW.;INCLUDES:;A243,M-120, # 261128 ORIFICE FOR NAT ;A244, M-121, # 261129 ORIFICE FOR LP.;;BLODGETT;OVEN SERIES: 90-M, 999, 1000, 1048, 1060-FAI, BCG, FA/GZL.;FOR UNITS WITH FMEA SAFETY