2.563 in. Lg, 1.625 in. W, consist of 1 housing, 1 cover, 1 type nmale input connector, 1 thermocouple 5 ma rating, 2 capacitors, male input connector, 1 thermocouple 5, ma rating, 2 capacitors, male input connector1 thermocouple 5, ma rating 2 capacitors, output insulator and center conductor