This is a modified adapter to fit standard exhaust hoses to SH-K40 IV 40W Laser Cutter. The original http://www.thingiverse.com/thing:57109 part didn't fit.
It's made out of 3mm birch plywood. For the machine side a 5mm thick foam tape from 3M was used. Standard 100mm ducts can be joined on the other side.
The SVG file hosts three layers allowing to print all parts sequentially even on a 30x20cm laser cutter (as the SH-K40 iV is).