I guess I don't know what size the jets are then, they are printed on the bottom of the jet. I have a set that have .120, .115, and .105. That is the only way I can ID them. I don't have a regulator, I have the return on it. Believe it or not, we use a hose clamp on the line and that is how the pressure is set. We have not had any issues until now. I did find an issue today that two of the four air screws were completely closed, we always set them at 1 and 1/2 out. Dan