No, these are of the Charlotte variety.
And a steam roller is built like a Chieftain (get the 'music' allusion, though that is somewhat debateable) tank these days.
It might be a bit much for the internal organs, though, now that Goerge has mentioned them.
Potiate livers can be conserved as a delicacy and made into paté (can't be arsed to remember how to do an 'a circonflex').
But you do need rather a lot of them.