Those are Sophia's in both mine and chadsmo's pictures. It most definitely fits and it works very well. The SnP tank comes with its own full set of red soft Viton© food grade O-rings(along with the regular black ones that are installed). You can keep the one that comes with the Sophia for another tank. As far as NEEDING the red o-ring. I have one SnP with the red o-rings and one without. Using the red soft o-rings makes it easier to turn the juice control but I can still do it with the regular black ones. I don't mess withe the juice control in the Sophia much. For me, it's set and forget. So the red o-ring is not NEEDed but it makes it a little easier.
