Summary Hi This is an update for the Chinese blue 40W laser. I do not know if it also fits other laser cutter. It uses the ventilation supplied with the laser cutter. As the ventelationen now fills out the entire exhaust hole of the laser my ventilation has become much better, and therefore I could go 35-40% down in power when I have to cut 3mm wood. Print Settings Printer Brand: RepRap Printer: Prusa I3 MK2 Rafts: No Supports: No Resolution: 0,25 Infill: 15%