Replacement block heater cord for 6404, 6466, 6513, 6619, 4000, 4020, 4040, 4230, 4240, 4320, 4430, 4440, 4520, 4620, 4630, 4640, 4840, 5020, 6030, 7020, 7520, 8430, 8440, 8630, 8640, and combine models: 6620, 7700, 7720, and 8820