DIRECT SPARK TYPE; 1-15/16 INCH LENGTH X 4-1/16 INCH WIDTH X 5-1/4 INCH HEIGHT SIZE; GAS-FIRED FURNACES, BOILERS, AND OTHER HEATING APPLIANCES APPLICATION; -40 TO 147 DEG F TEMPERATURE RATING; 24 VOLT AC AT 60 HERTZ ELECTRICAL RATING; S89F MODEL