Air King ASLC50MBG Exhaust Fan With Light 120 Volt 1.4 Amp 50 cfm at 0.1 Inch

Sold in bulk packs for larger projects, contractor packs allow the housing that is needed for rough-in installation to be sent first.
Then after the interior is completed, the internal workings of the unit (motor/blade/grill) can be received and installed.