I measured my tube and it is the correct one for the 400 snorkel. But what does the stove look like? What side goes into the stove? The stove I have only fits one end of the tube, it's the end that has like a 3/16 hole in it that fits into the stove, the other end is like a 16th or 1/8 inch wider and won't fit into the stove.
