Hello Tom,
Yes it is. Which tank are you looking at? There are two sizes (very similar) that do 35, 16, standard 8 and super 8. There are also some larger less common ones that are water jacketed. There is also a Meopta one that only does 30ft of 16mm or standard 8mm (which is 16mm wide before splitting). I have 3 of the 1-35, 2-16, 2-standard 8, and 2 super8 types and the instructions, which used to be online, but don't seem to be there any more. You can load 2 super8 films, but the second one can be a little tricky, because you have to attach more parts before loading. These tanks work very well, and are easy to load, after you get the knack of it.
Cheers,
Clarence