4in dust collector coupler

A simple coupler I made to connect a 4" OD elbow to the 4" dust port of my Dewalt planer (DW735) . The ID of this coupler is slightly under 4" but when printed in flexible filament such as TPU it makes for a nice snug fit. Length is about 3.5"

This is only for the 4" coupler. For this configuration, you'll still need the 90º elbow, such as this: http://www.rockler.com/elbow-connector-dust-collection-fittings