I have to move my shop.  Here is some 4″ ductwork that I currently am not using and need to find a home for.  Some of this is heavy-gauge ducting from the reputable company famous for it’s cyclone collectors.  Some of it is regular gauge ductwork.  The lot includes some elbows, Y-fittings, and blast gates.  If I find more in the shop, I will add to the pile in the photo.  I already have one more 8′ ducting section not in the photo.  This is free to a good home.