NEJE Air Assist Pump For Laser Cutting Engraving Machine(US Plug)Features 1. Cut Deeper Faster : Equipped with an air assist set on the laser engraver for wood and metal, large and stable air blows away smoke and debris generated during laser engraving machine working, helping engraver to cut faster and deeper, increasing laser efficiency, thus saving your time. 2. Clean Surfce and Smooth edge : Air Assist Set uses air to quickly reduce the temperature of the cut material surface, preventing distortion and