YL H Series H1 70W CO2 Laser TubeDownload the Manual Precision Engraving: The YL H Series CO2 Laser Tubes offer superior construction to produce stable laser beams for precise markings on a wide variety of materials. Cut through thick materials and engrave your designs faster, deeper, and clearer. The water outlet and inlet allow efficient flow of cooling water. Made out of borosilicate glass, copper, and aluminum alloy Equipped with threaded poles to attach a red laser guidance