ABOUT LASER CO2 TUBE [SYNRAD - USA]Laser operation occurs when a medium (in our case CO2) is excited within a chamber. Ours is a sealed metal tube. This light is focused to a small, intense beam that may be used for cutting or "writing" on variety of materials.Lasers function as components within a system and are commonly used in such applications as Engraving, Cutting, Marking and even 3D Prototyping.Synrad lasers have operated in excess of 45,000 hours and are still going strong. Our sealed CO2 lasers are able to work non-stop, 24-hours-a-day for years without any maintenance.