This listing is for an air cleaner assembly.  It was removed from a Briggs and Stratton model #42A7071653-01 17hp opposed twin cylinder engine.  It is in nice condition.  It may fit other models as well.  Please confirm that this part will fit your mower before purchase.  Payment within 2 days of purchase.  I will combine shipping on multiple purchases when possible.  If you are looking for a part that I don't have listed please ask, I might have one.  Thanks for looking!