4 inch thru wall dust collector sleeve with flange

I needed to extend dust collection through an interior wall.  My needs are small enough that I can't justify the expense of a fully piped dust collection system.  

Print with supports on the build plate for the flange.  

The fit was snug and not overly tight with my 4" hole saw.

The second model is for the other side of the wall.  I didn't use it because of the already snug fit in the hole.