Sorry Gaz, i dont know the sizes, and very few can help us on this one. The early victa literature, which is what's more commonly available doent show the later stuff. i checked a couple of VSX160 mowers earlier today and the 2 ring jet was fitted to both of them. The newer jets don't have the ball in them, as far as i know, which is what leads me to believe that yours has probably been changed somewhere along the way.
