FOUR 0.375” DIAMETER CARTRIDGE HEATERS: WATLOW FIREROD #9722G-G4-N17-NX4U; 300 W; 120V; APPROX 4.75” LONG. NEW PART # PER WATLOW IS G5J-15227; RATED TO APPROX 1000 F. CENTER THERMOCOUPLE PORT. APPROX 1.125” X 0.5” NOTCH AT EACH CORNER. APPROX 17 POUNDS. QTY 5. ITEM #2203.