Pro-Vertical Vent Cover Supply (Oil Rubbed Bronze) - 7" x 4" opening size (8.5" x 5.5" overall), no mounting holes

The vent we recieved is beautiful, almost half an inch smaller than the size I requested. Wouldn't be a problem if I didn't already have to reduce my mesasurements by half an inch both ways because they will only take whole numbers. BARELY worked for the hole I needed it for, but overall we're still happy with what we got, if only barely.