Replacement reaction chamber thermocouple for: All E-Classic 1400, 2300, 2400 models; E-Classic 1450 models with S/N E103487 and lower. S/N E103490 and E103491 also use asm 7260; E-Classic 3250 models with S/N E402065 and lower; E-Classic 3200 models with S/N E400924 and lower.