Blower fan hose adapter

This is a parametric adapter for connecting an air blower fan to a hose so that you can make your own dust collection system. It replaces the stock vent cover. The one I have is connected with 4 screws spaced 187mm apart. The images show one with a 98mm outside diameter that's 140mm tall from the top of the base to the end of the adapter. The blower is a Lasko / B-Air Model BA-VP-15-BL