The Robertshaw 1980-048 48" Snap-Fit Replacement Thermocouple is a high-quality thermocouple designed for use in pilot burner applications, commonly found in gas appliances such as furnaces, water heaters, and stoves. This thermocouple ensures reliable flame detection and safe operation by generating a voltage in response to heat from the pilot flame, which is necessary for keeping the gas valve open. Replacement Thermocouple, Snap-Fit, Voltage 18 to 30 mV, Gas Type LP/NG, Tip Style Snap-Fit Stainless Steel