The new CO2 laser tubes are epoxy sealed and water cooled. They are easy to install, and compatible with selected CO2 laser machines, offering high beam quality and longevity. Metal sealed tubes at higher wattage are also available. Each tube was tested before shipping with 100%+ power output with life time up to 2,000 hours. The laser tubes come with 6 month limited warranty for North American customers. Warranty covers failure under normal operating conditions and does not cover break or damage caused from mishandling, misuse, neglect, or accidental breaking. Expedited shipping available.