This is a remix from BusterBeagles AirAssist
https://www.thingiverse.com/thing:5154625#Summary

In my opinion this design is much safer to use, because you can see and clean the lens easier and the Nozzle can't get in the way or melt in front of the laser, which may shatter your lens.

In this design everything is far away from the laserbeam. The nearest part is a brass nozzle.

Print it with a regular fdm or resin printer and screw a spare nozzle from your 3d printer in the top. I drilled a 2mm hole in my nozzle to allow a sufficient amount of air to go through.

Only made for the 10W - 16mm Laser module of Xtool D1