They are identical components

whereas this 750mv thermopile is a thermopile generator designed for millivolt control systems

Constructed from durable materials for extended operational life

Smith 100111824 Burner/Sleeve Assembly is an essential OEM replacement kit engineered for high-recovery commercial water heaters and industrial boilers

two-pipe room thermostat designed for dual-temperature control in complex HVAC systems

Lennox 27K66 Burner 321894-706 They are identical componentsThe Lennox 27K66 Inshot Burner is an OEM replacement part engineered for high efficiency atmospheric combustion in residential and commercial furnaces. As a veteran grade furnace burner replacement, this component is designed specifically to withstand the thermal stress of high cycle heating demands. It effectively replaces legacy part numbers 27K6601, 65257000, and LX013, ensuring your system maintains its original factory specifications for flame