2.5" Hose Adapter w/ Mounting Flange

2-1/2" Flexible duct hose adapter with a square mounting flange.   The adapter is made of injection molded abs plastic, and features a square flange that will mount to any flat surface.  The flange measures 3-1/2" x 3-1/2", and the adapter is 1-1/4" tall.  The flange has four holes in each corner for 1/8" screws.