This is the air assist tube inlet fitting used with our blackTooth Laser Cutter and is installed at the nozzle of the laser head (where the lens is located). The air is pumped into the conical section of the nozzle and creates a positive air pressure inside this area and doesn't let particles (smoke and dust) near the lens. The air assist will also mitigate flare-ups and if strong enough, can clean the area that is being marked by the laser.
