Normally, the aperture of the small-fire nozzle in the inner ring of a double-jet natural gas stove is 0.7mm, and the aperture of the large-fire nozzle in the outer ring is 1.35mm. Some stoves have small and large burners, and there will be slight differences. If possible, could you please provide the brand and model of your stove? Or let me guide you with actual photos. I worked as a stove technical engineer. If you don’t know, please continue to ask