This is a brand new OEM Fantech Drive Pack 49004 For Exhaust Fan DP-15"-DX. This drive pack part number is for use with Fantech:

Model             Shell Part Number               Motor Part Number 

5BDU15                  49803                                    49911

5BDD15                  49813

Note: Torque Pully Set Screws 70 IN-LBS Min To 87 IN-LBS Max. At Assembly