The model number is normally found inside the cooker hood or on the side of the cooker hood casing.
Baumatic Cooker Hood Outlet Pipe Vent Attachment BT85.1GL-SI BT9.3BGL
Baumatic Cooker Hood Vent Outlet Pipe Attachment Genuine
Baumatic Cooker Hood Fan Motor Genuine
Baumatic Cooker Hood Motor & Connector Genuine