K40 Laser Cutter Exhaust Adapter
thingiverse
Based on http://www.thingiverse.com/thing:695226, this adapter fits K40-style 40W chinese laser cutters for connecting a 4" exhaust hose. Improvements include: Better fit (at least with my print settings) Slightly greater shell thickness for extra durability One source file for both one-piece and two-part versions Like the original, the two-part version is joined by two 3mm bolts.
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