Tau Ceti pro series dimensions

Im in need of a set of filters to fit my buckshot 50s. I need something really short, my buckshot carbon filters were almost 3 inches tall and rubbed the side of the boat and they fell apart on me. The only thing I could find that was really short was a Tau Ceti.

I found all the info I needed on atlantic jetsports site about the filters except for one dimension. The 1.5 inch tall ones will fit without rubbing the side of the boat on my Kawi-Doo. The only dimension they dont list is the flange inside diameter. My carbs have 70mm flanges machined in. Can anyone tell me the size? I see they have adapters for every carb, Im hoping they are all 70mm.
 
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