Spiral Hook attachment 134230 (a number for it) . THIS DOUGH HOOK DID NOT FIT OUR 60 QT Hobart however its for at least a 60 qt. commercial mixer likely larger. Seems to be either a 80qt or 140qt.  Measurements see pictures - 11x9 1/4x 18 1/2.

If we knew what this fit we would be asking much more for it.  Your buying this as is where is. If you dont know it will work or you dont want to make it work for you then please do not buy it.