Well first off, by looking at it I can see that the description is wrong.
Compare the size to the main snare drum which is a 14" with the one
mounted to the right and you can see that the sizes are clearly the
same.
And if you look at the 12" tom (G), you can see that the snare drum
to the right is clearly larger in diameter. As to the model, I haven't
the slightest idea.